Best 8 Butter Croissant Recipes

BUTTER CROISSANTS

Steps:

• Combine the butter and the 3 tablespoons of flour using two knives or a pastry blender.
• Place the butter mixture between two sheets of waxed paper and beat it with a rolling pin until it becomes soft and malleable. Make sure the butter stays cold though. When you're making laminated doughs such as croissant dough, puff pastry dough, or danish pastry dough it's important that the dough stays cold so the butter and the dough form distinct layers.
• Shape the block of butter into a 6- by 8-inch rectangle.
• Place the block of butter somewhere cool or back in the refrigerator while you make the dough. Don't let the butter re-harden though. If the butter re-hardens it will break through the dough when you go to roll it out. You want the butter cold but you also want it to be spreadable.
• For the dough combine the milk, yeast and sugar.
• Let sit 5 minutes or until yeast is dissolved and the surface is all foamy.
• Stir in the salt.
• Stir in the 2 7/8 cups of flour, all at once, until thoroughly combined. You should have a very soft wet dough.
• Cover the bowl of dough and place it in the refrigerator until it's chilled. If the dough is warm it might cause the butter to melt.
• Using a shaker or a sifter, generously flour your work surface. By generously I don't mean a simple dusting. You want a good substantial layer of flour. If you can see the counter top or table top underneath the flour then you need to sprinkle on more. This dough is very wet and if you don't use enough flour on your work surface the dough is going to stick. Don't add anymore flour to the dough itself because the flour you use to roll out the dough is only going to be on the surface of the dough, and it's going to be brushed away.
• Roll the dough into a 10- by 14-inch rectangle. Brush away the excess flour on the surface of the dough with a pastry brush.
• Place the block of butter on one side of the dough and fold the other side over and seal the edges.
• Turn the dough so that the fold is on the left and the part that opens is on the right (like the way a book opens).
• Roll the dough into a 9- by 17-inch rectangle. Be sure to check that it's not sticking to the table. When you you roll out the dough you want to use smooth even strokes and make sure you don't roll over the edge of the dough. If you do you'll crush the layers you're trying to make.
• Use a pastry brush to brush away ALL excess flour off the surface of the dough. This step is important because if you don't it will keep the dough from forming the layers properly.
• Fold 1/3 of the dough on to itself.
• Brush away the flour.
• Fold the other third of the dough on top of that so that the dough resembles a folded business letter. Be sure to keep the edges and corners lined up. This is what's called a "turn". A turn gets its name because each time you roll out the dough you have to turn it a quarter turn so the position of the dough is always the same each time you roll it out.
• Roll out the dough and fold the dough in thirds as you did before.
• At this point you should wrap the dough up and refrigerate it for 45 minutes to an hour.
• Repeat the rolling and folding in thirds like a business letter two more times. Refrigerate the dough for an hour between each turn. Before rolling out the dough each time make sure you always position the dough so that the top flap has the fold on the left and the part that opens on the right. After the 4th turn the dough needs to be refrigerated for at least 3 hours or overnight if it's more convenient.
• Roll the dough into a 10- by 20-inch rectangle. Be sure the corners are square.
• Cut the dough into eight squares by cutting it half lengthwise and then cutting each half into 4 squares. A pizza cutter is a great tool for this job.
• Cut each square into two triangles.
• Take one of the triangles and stretch it until the two short sides are as long as the long side ( the hypotenuse in case you've forgotten your geometry).
• Roll up the triangle and curve the ends in slightly to form a crescent shape.
• Repeat with the rest of the triangles of dough.
• Place the croissants at least 2 inches apart on baking sheets that have been lightly sprayed with cooking spray or covered with parchment paper.
• Cover the croissants with towels and place somewhere where it's not too warm. You don't want the butter in them to become soft remember.
• Let croissants rise until they're nearly doubled in size. This may take a few hours. Be patient. I've let them rise for as long as 5 to 6 hours. After about 2 hours the surface of the croissants may start to dry out. If this happens cover them with a damp paper towel and then put another towel on top of that.
• Combine the egg and the teaspoon of water.
• Brush a light coating of egg wash on each croissant. If the croissants are exceptionally puffy you'll need to be extra gentle when you brush on the eggwash. Another option is to put the eggwash in a spray bottle and spray the eggwash on the croissants.
• Bake the croissants in a preheated 425° F oven for 12 to 15 minutes until they're golden brown.

BUTTERY CROISSANTS

Steps:

• In a small bowl, beat butter and flour until combined; spread into a 12x6-in. rectangle on a piece of waxed paper. Cover with another piece of waxed paper; refrigerate for at least 1 hour., In a large bowl, dissolve yeast in warm water. Add the milk, sugar, egg, salt and 2 cups flour; beat until smooth. Stir in enough remaining flour to form a soft dough. Turn onto a floured surface; knead until smooth and elastic, about 6-8 minutes. , Roll dough into a 14-in. square. Remove top sheet of waxed paper from butter; invert onto half of dough. Remove waxed paper. Fold dough over butter; seal edges. , Roll into a 20x12-in. rectangle. Fold into thirds. Repeat rolling and folding twice. (If butter softens, chill after folding.) Wrap in plastic; refrigerate overnight., Unwrap dough. On a lightly floured surface, roll into a 25x20-in. rectangle. Cut into 5-in. squares. Cut each square diagonally in half, forming two triangles. , Roll up triangles from the wide end; place 2 in. apart with point down on ungreased baking sheets. Curve ends down to form crescent shape. Cover and let rise until doubled, about 45 minutes. , Bake at 375° for 12-14 minutes or until golden brown. Remove to wire racks. Serve warm.

QUICK BUTTER CROISSANTS

Steps:

• In a large bowl, dissolve yeast in warm water. Let stand until creamy, about 10 minutes. Stir in milk, salt, sugar, 1 egg, 1 cup flour and melted butter. Beat to make a smooth batter; set aside.
• In a large bowl, cut the one cup firm butter into remaining four cups flour until butter particles are the size of dried kidney beans. Pour the yeast batter over this and carefully turn the mixture over with a spatula to blend, just until all flour is moistened. Cover with plastic wrap and refrigerate until well chilled, at least 4 hours or up to four days.
• Turn dough out onto a floured surface; press into compact balls and knead about 6 turns to release air bubbles. Divide dough into four equal parts. Shape one at a time. Refrigerate the remaining dough.
• Roll one part of the dough on a floured board into a circle 17 inches in diameter. With a sharp knife or pizza cutter, cut the circle into eight equal pie-shaped wedges. Roll the wedges loosely toward the point. Shape each roll into a crescent and place on an ungreased baking sheet. Allow 1 1/2 inches space between each roll.
• Cover and let rise at room temperature until almost doubled in size. Approximately 2 hours. Meanwhile, preheat oven to 325 degrees F (165 degrees C).
• Brush croissants with beaten egg. Bake in preheated oven for 35 minutes, until golden.

CROISSANTS

Steps:

• Make the dough: Stir yeast, water, and 1 teaspoon sugar in a bowl. Let stand until foamy, about 5 minutes. Butter a large bowl; set aside. Put bread flour, all-purpose flour, remaining 3 tablespoons plus 2 teaspoons sugar, and the salt into the bowl of an electric mixer fitted with the dough hook; mix on low speed until combined. Add yeast mixture, milk, and butter; mix until dough just comes together.
• Knead dough: Scrape dough out onto a lightly floured work surface. Using lightly floured hands, knead until smooth, about 3 minutes. Transfer to buttered bowl, turning to coat.
• Let dough rise: Cover dough with plastic wrap; transfer to the refrigerator. Let rise until doubled in bulk, about 2 hours (dough should not spring back when you press it with your finger).
• Make the butter package: About 45 minutes after the dough begins rising, put flour and butter into the clean bowl of an electric mixer fitted with the paddle attachment. Mix on medium speed until well combined, 3 to 4 minutes. Scrape butter mixture out onto a piece of parchment paper; shape into a rectangle. Top with parchment, and roll out to an 8-by-10-inch rectangle. Transfer to a baking sheet, and refrigerate 30 minutes.
• Roll out dough: Turn out dough onto a lightly floured work surface; shape into a rectangle. Roll out to a 10 1/2-by-16-inch rectangle, about 1/2 inch thick, with short side facing you.
• Place butter package on dough: The butter package should be cool but pliable; your finger should leave an indentation but the butter should still hold its shape. If too soft, continue to refrigerate; if too firm, let stand at room temperature briefly. Place horizontally on bottom half of dough; remove parchment. Fold top half of dough over butter package, and pinch edges of dough to seal.
• Roll in butter: Turn dough so that a short side is facing you and the seam is on the right. Roll out to a 10-by-20-inch rectangle, about 1/2 inch thick (keep the corners as square as possible).
• Fold dough into thirds: Remove any excess flour with a pastry brush. Starting at the far end, fold rectangle in thirds as you would a business letter (this completes the first of 3 "turns").
• Mark dough: Mark the dough with your knuckle (later, this will help you remember how many turns have been completed). Wrap dough in plastic, and refrigerate 1 hour.
• Repeat process: Remove from refrigerator, and press the dough; it should be pliable but have some resistance. If too soft, return to refrigerator; if too firm, let stand at room temperature, 5 minutes. Repeat the preceding three steps to complete two more turns (make 2 marks for the second turn and 3 marks for the third turn); always start with a short side facing you and the seam on the right, rolling lengthwise before crosswise. After the second turn, wrap dough in plastic, and refrigerate 1 hour. After the third and final turn, wrap dough in plastic, and refrigerate 8 hours (or overnight).
• Roll out and chill dough: Turn out dough onto a lightly floured work surface, and roll out to a 30-by-16-inch rectangle. If dough becomes unmanageable, cut in half crosswise, and roll out two 15-by-16-inch rectangles (refrigerate 1 piece as you work with the other). Chill in freezer 15 minutes. Remove dough, and remeasure: It should match original dimensions; if not, roll out again. If dough becomes too warm or elastic, chill in freezer, 15 minutes.
• Cut dough: Cut dough into two 30-by-8-inch rectangles (or four 15-by-8-inch rectangles). Stack rectangles, lining up edges (if you have four smaller rectangles, make two stacks).
• Trim dough and cut into triangles: Using a pastry or pizza wheel and cutting at a 20-degree angle, trim a small wedge from one short side to create an angled side. Cut dough into triangles, each with a 4 1/2-inch base. You should have about 20 total.
• Cut slits: Cut a 1-inch slit in the middle of the base of each triangle. Separate the stacks, transferring half the triangles to a parchment-lined baking sheet; cover, and refrigerate.
• Begin shaping croissants: Working with one triangle at a time and keeping remaining triangles covered with a clean kitchen towel, hold the two corners of the base, and stretch to lengthen it slightly. Grasp inner corners formed by the slit in the base, and lift and stretch them toward the outer sides of the triangle; press to seal.
• Roll croissants: Using your fingertips, roll the base of the triangle up and away from you, stretching the dough slightly outward as you roll to elongate the point (when finished, the point should be tucked under the croissant).
• Finish shaping croissants: Bend the two ends toward you to form a crescent shape (the ends should almost touch). Transfer to parchment-lined baking sheets, spacing croissants 2 inches apart. Repeat with remaining triangles. Cover loosely with plastic wrap, and let stand in a warm place until croissants have doubled in bulk and are very soft, 1 1/2 hours to 2 1/4 hours, depending on the temperature of room.
• Brush with egg: Preheat oven to 400 degrees, with racks in upper and lower thirds. Brush tops of croissants with egg. Bake, rotating sheets halfway through, until croissants are puffed and golden brown, 20 to 25 minutes. Let cool slightly on sheets on wire racks. Serve warm or at room temperature.

BUTTER CRESCENTS

Steps:

• Warm the milk in a small saucepan until bubbles form at the edges; remove from heat. Mix in the butter, sugar, and salt. Let cool until lukewarm. In a small bowl, dissolve yeast in warm water. Let stand until creamy, about 10 minutes.
• In a large bowl, combine milk and yeast mixtures. Stir in 1 egg. Beat in flour 1 cup at a time until dough pulls together. Turn out onto a lightly floured surface, and knead until smooth and elastic, about 8 minutes. Lightly oil a large bowl, place the dough in the bowl, and turn to coat. Cover with a damp cloth, and let rise in a warm place until doubled in volume, about 1 hour.
• Deflate the dough, and turn it out onto a lightly floured surface. Divide the dough into two equal pieces, and form into rounds. Cover, and let rest 10 minutes.
• Using a floured rolling pin, roll each dough half into a 12 inch circle. Cut each circle into 6 wedges. Roll each wedge up towards the point. Bend ends inward to form crescents, and place point side down on lightly greased baking sheets. Cover, and let rise until doubled, about 30 minutes. Meanwhile, preheat oven to 400 degrees F (200 degrees C).
• Brush rolls with beaten egg, and bake for 12 to 15 minutes in the preheated oven, or until golden brown.

PERFECT BUTTER CROISSANTS

Steps:

• It is important to use only a small amount of yeast in croissants so that the dough never rises before it is placed in the oven. If dry yeast is used, follow directions on package. If fresh yeast is used, cream it with sugar and salt to make a syrup.
• Place 3 1/2 cups flour in a large bowl. Make a well in the center. Add yeast, sugar, salt, and 2 tablespoons of the butter (cut into pieces and softened) and enough cold milk to make a medium-firm dough-NOT as firm as bread dough, but not sticky. Knead dough for a few minutes, only until smooth, not elastic (You can use a stand mixer initially & finish kneading by hand on a floured surface until the dough is smooth, about 3-4 minutes.) If the dough is kneaded too long, the croissants will not be tender and flaky. Place dough to rest in the refrigerator for 10 minutes.
• While dough is resting, shape butter into a flattened brick, rolling it in some of the remaining flour to prevent sticking. Place butter on a sheet of wax paper. Sprinkle it with flour and cover with another sheet of wax paper. Then roll out butter into a square ¼ inch thick. Cut square in half. Wrap pieces in wax paper and place in refrigerator.
• Remove dough from the refrigerator and roll it out on a cloth well dusted with flour or a well-floured surface, making a rectangle about 3 times longer than it is wide. Brush excess flour from surface of dough. Place a piece of butter in the center. Fold ONE end of dough over butter. Place remaining butter on top. Fold second end of dough over butter. Press edges together to seal.
• Place dough on cloth so that the short ends are parallel to the edge of the table nearest you. Roll out on floured cloth into a long rectangle as before. Brush off excess flour. Fold both ends to meet in the center. Then fold once more, in half, as if you were closing the pages of a book, making 4 layers.
• Press all edges together. Wrap and chill for one hour. Place dough on floured cloth, again being sure that the short ends are parallel to the edge of the table nearest you. Roll out dough into a long rectangle. Fold ends to meet in the center, then fold once again as before.
• Chill dough at least 2-3 hours, or until it is very cold.
• Cut dough in half. Roll out each half separately into a sheet 1/8 of an inch thick (chill half not being worked on). Cut into long strips 5 inches wide. Divide strips into triangles using a sharp paring knife or a pizza cutter. Roll up widest side of the triangles toward opposite point fairly tightly, stretching slightly as you roll to make them longer. DO NOT try to shape further for now. First, chill rolls in freezer for ½ hour.
• Then, removing only 4-5 at a time, make each into a thinner, longer, and more compact shape by rolling it firmly against the surface with open palm of hand. Place on a greased baking sheet, curving each into a croissant. Chill again until very cold (you could actually freeze the formed rolls at this point).
• Set oven to 475°F Brush rolls with egg yolks mixed with cream. Place in preheated oven for 5 minutes. Reduce heat to 400°F Continue baking about 8-9 minutes longer, or until croissants are golden brown. Let cool (and complete carry-over baking) before eating.

CROISSANTS

Steps:

• Twenty-four hours before serving, start the détrempe: In the bowl of a stand mixer fitted with the dough hook, combine the flour, sugar, salt and yeast, and stir to combine. Create a well in the center, and pour in the water and milk. Mix on low speed until a tight, smooth dough comes together around the hook, about 5 minutes. Remove the hook and cover the bowl with a damp towel. Set aside for 10 minutes.
• Reattach the dough hook and turn the mixer on medium-low speed. Add the butter pieces all at once and continue to mix, scraping down the bowl and hook once or twice, until the dough has formed a very smooth, stretchy ball that is not the least bit sticky, 8 to 10 minutes.
• Form the dough into a ball and place seam-side down on a lightly floured work surface. Using a sharp knife, cut two deep perpendicular slashes in the dough, forming a "+." (This will help the dough expand into a square shape as it rises, making it easier to roll out later.) Place the dough slashed-side up inside the same mixing bowl, cover with plastic wrap and let rise at room temperature until about 1 1/2 times its original size, 45 minutes to 1 hour. Transfer the bowl to the refrigerator and chill for at least 4 hours and up to 12.
• As the dough chills, make the butter block: Place the sticks of butter side-by-side in the center of a large sheet of parchment paper, then loosely fold all four sides of the parchment over the butter to form a packet. Turn the packet over and use a rolling pin to lightly beat the cold butter into a flat scant 1/2-inch-thick layer, fusing the sticks and making it pliable. (Don't worry about the shape at this point.) The parchment may tear. Turn over the packet and unwrap, replacing the parchment with a new sheet if needed. Fold the parchment paper over the butter again, this time making neat, clean folds at right angles (like you're wrapping a present), forming an 8-inch square. Turn the packet over again and roll the pin across the packet, further flattening the butter into a thin layer that fills the entire packet while forcing out any air pockets. The goal is a level and straight-edged square of butter. Transfer the butter block to the refrigerator.
• Eighteen hours before serving, remove the dough from the refrigerator, uncover and transfer to a clean work surface. (It will have doubled in size.) Deflate the dough with the heel of your hand. Using the four points that formed where you slashed the dough, stretch the dough outward and flatten into a rough square measuring no more than 8 inches on one side.
• Place 2 pieces of plastic wrap on the work surface perpendicular to each other, and place the dough on top. Wrap the dough rectangle, maintaining the squared-off edges, then roll your pin over top as you did for the butter, forcing the dough to fill in the plastic and form an 8-inch square with straight sides and right angles. Freeze for 20 minutes.
• Remove the butter from the refrigerator and the dough from the freezer. Set aside the butter. Unwrap the dough (save the plastic, as you'll use it again) and place on a lightly floured surface. Roll the dough, dusting with flour if necessary, until 16 inches long, maintaining a width of 8 inches (barely wider than the butter block). With a pastry brush, brush off any flour from the surface of the dough and make sure none sticks to the surface.
• You're going to enclose the butter block in the dough and roll them out together. To ensure they do so evenly, they should have the same firmness, with the dough being slightly colder than the butter. The butter should be chilled but able to bend without breaking. If it feels stiff or brittle, let sit at room temperature for a few minutes. Unwrap the butter just so the top is exposed, then use the parchment paper to carefully invert the block in the center of the dough rectangle, ensuring all sides are parallel. Press the butter gently into the dough and peel off the parchment paper. You should have a block of butter with overhanging dough on two opposite sides and a thin border of dough along the other two.
• Grasp the overhanging dough on one side and bring it over the butter toward the center, then repeat with the other side of the dough, enclosing the butter. You don't need the dough to overlap, but you want the two sides to meet, so stretch it if necessary, and pinch the dough together along all seams so no butter peeks out anywhere. Lift the whole block and dust a bit of flour underneath, then rotate the dough 90 degrees, so the center seam is oriented vertically.
• Orient the rolling pin perpendicular to the seam and lightly beat the dough all along the surface to lengthen and flatten. Roll out the dough lengthwise along the seam into a 24-inch-long, 1/4-inch-thick narrow slab, lightly dusting underneath and over top with more flour as needed to prevent sticking. Rather than applying pressure downward, try to push the dough toward and away from you with the pin, which will help maintain even layers of dough and butter. Remember to periodically lift the dough and make sure it's not sticking to the surface, and try your best to maintain straight, parallel sides. (It's OK if the shorter sides round a bit - you're going to trim them.)
• Use a wheel cutter or long, sharp knife to trim the shorter ends, removing excess dough where the butter doesn't fully extend and squaring off the corners for a very straight-edged, even rectangle of dough. Maintaining the rectangular shape, especially at this stage, will lead to the most consistent and even lamination. If at any point in the process you see air bubbles in the dough while rolling, pierce them with a cake tester or the tip of a paring knife to deflate and proceed.
• Dust any flour off the dough's surface. Grasp the short side of the rectangle farther from you and fold it toward the midline of the dough slab, aligning the sides. Press gently so the dough adheres to itself. Repeat with the other side of the dough, leaving an 1/8-inch gap where the ends meet in the middle. Now, fold the entire slab in half crosswise along the gap in the center. You should now have a rectangular packet of dough, called a "book," that's four layers thick. This is a "double turn," and it has now quadrupled the number of layers of butter inside the dough.
• Wrap the book tightly in the reserved plastic. If it is thicker than about 1 1/2 inches, or if it's lost some of its rectangularity, roll over the plastic-wrapped dough to flatten it and reshape it. Freeze the book for 15 minutes, then refrigerate for 1 hour.
• Let the dough sit at room temperature for about 5 minutes. Unwrap and place on a lightly floured surface. Beat the dough and roll out as before (Step 10) into another long, narrow 3/8-inch-thick slab. It should be nice and relaxed, and extend easily. Dust off any excess flour.
• Fold the dough in thirds like a letter, bringing the top third of the slab down and over the center third, then the bottom third up and over. This is a "simple turn," tripling the layers. Press gently so the layers adhere. Wrap tightly in plastic again and freeze for 15 minutes, then refrigerate for 1 hour.
• Let the dough sit at room temperature for about 5 minutes, then unwrap and place on a lightly floured surface. Beat the dough and roll out as before, but into a 14-by-17-inch slab (15-by-16-inch for pain au chocolat or ham and cheese croissants). The dough will start to spring back, but try to get it as close to those dimensions as possible. Brush off any excess flour, wrap tightly in plastic, and slide onto a baking sheet or cutting board. Freeze for 20 minutes, then chill overnight (8 to 12 hours). If making pain au chocolat or ham and cheese croissants, see recipes.
• Four and a half hours before serving, arrange racks in the upper and lower thirds of the oven. Bring a skillet of water to a simmer over medium-high heat. Transfer the skillet to the floor of the oven and close the door. (The steam released inside the oven will create an ideal proofing environment.)
• As the steam releases in the oven, line two rimmed baking sheets with parchment paper and set aside. Let the dough sit at room temperature for about 5 minutes. Unwrap (save the plastic for proofing), place on a very lightly floured surface, and, if necessary, roll out to 17-by-14 inches. Very thoroughly dust off any excess flour with a pastry brush. Use a wheel cutter or long knife and ruler to cut the shorter sides, trimming any irregular edges where not all the layers of dough fully extend and creating a rectangle that's exactly 16 inches long, then cut into four 4-by-14-inch rectangles.
• Separate the rectangles, then use the ruler and wheel cutter to slice a straight line from opposite corners of one rectangle to form two long, equal triangles. Repeat with the remaining rectangles to make 8 triangles. Trim the short side of each triangle at a slight angle, making them into triangles with longer sides of equal length.
• Working one triangle at a time, grasp the two corners of the shorter end, the base of the crescent, and tug gently outward to extend the points and widen the base to about 3 inches. Then, gently tug outward from about halfway down the triangle all the way to the point, to both lengthen the triangle and thin the dough as it narrows. Starting at the base (the short end), snugly roll up the dough, keeping the point centered and applying light pressure. Try not to roll tightly or stretch the dough around itself. Place the crescent on one of the parchment-lined baking sheets, resting it on the point of the triangle. If the dough gets too soft while you're working, cover the triangles and freeze for a few minutes before resuming rolling. Space them evenly on the baking sheets, four per sheet. Very loosely cover the baking sheets with plastic wrap, so the croissants have some room to expand.
• Three and a half hours before serving, open the oven and stick your hand inside: It should be humid but not hot, as the water in the skillet will have cooled. You want the croissants to proof at 70 to 75 degrees. (Any hotter and the butter will start to melt, leading to a denser croissant.) Place the baking sheets inside the oven and let the croissants proof until they're about doubled in size, extremely puffy, and jiggle delicately when the baking sheet is gently shaken, 2 to 2 1/2 hours. Resist the urge to touch or poke the croissants as they proof: They're very delicate. Try not to rush this process, either, as an underproofed croissant will not be as light and ethereal.
• Remove the baking sheets from the oven and carefully uncover them, then transfer to the refrigerator and chill for 20 minutes while you heat the oven. Remove the skillet from the oven and heat to 375 degrees.
• In a small bowl, stir the yolk and heavy cream until streak-free. Using a pastry brush, gently brush the smooth surfaces of each crescent with the yolk and cream mixture, doing your best to avoid the cut sides with exposed layers of dough.
• Transfer the sheets to the oven and bake for 20 minutes. Rotate the baking sheets and switch racks, and continue to bake until the croissants are deeply browned, another 10 to 15 minutes. Remove from the oven and let cool completely on the baking sheets.

SOURDOUGH CROISSANTS

Steps:

• Levain: On day 1 at night, mix together starter, flour, and water in a large bowl. Cover with a damp kitchen towel or a large plate and let stand at room temperature 8 to 10 hours.
• Dough: On day 2 in the morning, make a sponge: Dissolve levain in warmed milk, stirring or whisking to combine. Add 300 grams flour (2 1/4 cups) and mix to combine; sponge should feel like a thick batter. Let stand 30 minutes.
• Stir sugar and salt into sponge, then add remaining 275 grams flour (2 cups); stir to combine. Knead with floured hands on a lightly floured surface about 4 minutes. Wash and lightly oil bowl and return dough to it. Cover with a large plate or a damp kitchen towel. Let stand 30 minutes.
• With dampened hands, grab underside of dough, stretch it out, and fold it back over itself. Rotate bowl one quarter-turn. Repeat 6 times. Cover with cloth and let stand 30 minutes. Repeat folding process every 30 minutes until dough feels pillowy and elastic, and has increased in volume about 50 percent-a total of 6 to 8 times, 3 1/2 to 4 1/2 hours. Cover and let stand 1 hour, then refrigerate 30 minutes along with butter package (see step 5; this is so they have the same temperature and a similar texture, which makes them much easier to work with).
• Butter package: During last resting of dough, combine butter and flour in the bowl of a mixer and beat on medium speed to combine. Transfer to a piece of parchment, top with a second piece of parchment, and roll out to a 7-by-7-inch square. Transfer to a baking sheet and refrigerate 30 minutes (when ready, package should be waxy and pliable, not rock-solid).
• Turn rested and chilled dough onto a floured surface; let stand 10 minutes. Roll out to a 10-by-10-inch square. Place butter package in center of dough. Roll corners of dough out another 5 inches. Lift one side at a time over butter package, enclosing it in dough; pinch seams to seal. Give dough a few firm knocks along its seams with side of rolling pin.
• Roll dough out to an 8-by-24-inch rectangle. Fold into thirds like a letter (bottom 8 inches of dough up, then top 8 inches down over that). Turn so seam faces side; repeat this rolling and folding process once more. (If butter starts to ooze out, put dough on a baking sheet and refrigerate for 10 to 15 minutes before rolling out further.) Place folded dough on a baking sheet and refrigerate 30 minutes.
• Repeat rolling-and-folding process once more (the third turn). If time permits and you have energy, repeat one more time after another 30-minute rest in refrigerator. Roll dough out until it begins to spring back (this is just to get a jump-start on the final rolling), then transfer to a baking sheet lined with parchment. Cover and refrigerate at least 8 hours and up to 1 day. (It is possible to roll and shape after a shorter rest of about 4 hours, but the longer rest makes the dough easier to work with.)
• On day 3 in the morning, line 2 baking sheets with parchment. Place chilled dough on a floured surface and roll into a 23-by-16 1/2-inch rectangle. (If you find that it is springing back, or a lot of butter is oozing out, transfer to refrigerator for a few minutes. If small patches of dough break, exposing butter, sprinkle with some flour to cover and refrigerate briefly.) Trim edges straight. Starting at one short end, use a pizza or pastry wheel to cut dough in half lengthwise, so you have two 22 1/2-by-8-inch strips. (If your dough feels unwieldy, briefly refrigerate.) Cut each strip into 5 rectangles, each about 4 1/2-by-8 inches. Cut from one bottom corner to opposite top corner of each rectangle, creating two triangles.
• Arrange triangles on work surface, with shortest sides nearest you and long, pointed ends farthest from you. Gently stretch width of short ends slightly. Then roll croissants toward pointed ends, holding onto the points and gently tugging to elongate as you roll. Bend either end of croissants toward middle slightly to form crescent shapes. Place croissants on prepared baking sheets, spaced about 3 inches apart, tucking points under shaped crescents so they don't unfurl in the oven. (You should be able to fit 10 on each half sheet pan.)
• Drape with plastic wrap and let stand at room temperature until puffed, expanded by about 60 percent, and very soft, 2 to 3 hours. (Or, if you are shaping the night before baking, place all the croissants on a single baking sheet and refrigerate overnight, as they won't really expand much. Remove about 3 hours before you want to bake, divide them between 2 sheets, and allow to proof as above; it could take slightly longer, given that they are cold.)
• Preheat oven to 400°F. Whisk together egg yolks and cream. Brush proofed croissants evenly with egg wash and bake, rotating pans from top to bottom and back to front halfway through, until puffed, golden brown, and baked through, 25 to 28 minutes. Let cool on sheets on wire racks 15 minutes, then transfer directly to racks and let cool completely. (Croissants are excellent the day they're made, but if making ahead, let cool completely, then freeze in resealable plastic bags. To serve, wrap in parchment-lined foil and reheat from frozen in a 350°F oven until just heated through, about 10 minutes.)