Best 7 French Onion Soup Au Gratin Recipes

FRENCH ONION SOUP GRATINEE

Steps:

• Melt butter in a large pot over medium-high heat. Stir in salt, red onions and sweet onions. Cook 35 minutes, stirring frequently, until onions are caramelized and almost syrupy.
• Mix chicken broth, beef broth, red wine and Worcestershire sauce into pot. Bundle the parsley, thyme, and bay leaf with twine and place in pot. Simmer over medium heat for 20 minutes, stirring occasionally. Remove and discard the herbs. Reduce the heat to low, mix in vinegar and season with salt and pepper. Cover and keep over low heat to stay hot while you prepare the bread.
• Preheat oven broiler. Arrange bread slices on a baking sheet and broil 3 minutes, turning once, until well toasted on both sides. Remove from heat; do not turn off broiler.
• Arrange 4 large oven safe bowls or crocks on a rimmed baking sheet. Fill each bowl 2/3 full with hot soup. Top each bowl with 1 slice toasted bread, 2 slice Gruyere cheese and 1/4 of the Asiago or mozzarella cheese. Sprinkle a little bit of paprika over the top of each one.
• Broil 5 minutes, or until bubbly and golden brown. As it softens, the cheese will cascade over the sides of the crock and form a beautifully melted crusty seal. Serve immediately!

ONION SOUP GRATIN

Steps:

• In a large heavy pot, melt the butter over medium heat. Stir in the leeks, onions and shallots and toss to coat with the butter. Cook onions until they begin to soften. Cover and continue to stir occasionally. When the onions begin to turn golden, turn up the heat to medium high and add the pinch of sugar and nutmeg. Continue to cook until onions turn a rich golden brown. Season onions with salt and pepper. Add red wine and bring to a simmer. Cook for 3-5 minutes. Pour in warm stock and bring to a simmer. Preheat oven to 400 degrees. Ladle soup into ovenproof bowls and place bowls on baking sheet. Top each bowl with slice of bread and sprinkle with cheese. Bake for 15 minutes or until bubbly.

FRENCH ONION SOUP POTATO GRATIN

Steps:

• For the caramelized onions: In a large saucepan over medium-high heat, melt the butter. Once melted and bubbling, add a large handful of the onions and cook until translucent, 1 to 2 minutes. Repeat until all the onions have been added. Season with a pinch of salt and black pepper. Reduce the heat to low and cook, stirring occasionally, until the onions turn medium brown, about 30 minutes. If the onions start to get too dark, add 1 to 2 tablespoons of beef stock as necessary. Add the sherry to deglaze the pan. Add the mustard and stir to coat. Season with salt and pepper. Remove from the heat and set aside.
• For the potato gratin: Preheat the oven to 400 degrees F.
• Using a mandoline or a sharp knife, cut the potatoes into thin slices. Do your best to keep the potatoes in a stack--this will make it easier to layer them in the pan. Set the potatoes aside.
• Use the reserved butter wrapper to lightly grease the bottom and sides of a large (12-inch) cast-iron skillet. Discard the wrapper.
• Arrange a thin shingled layer of potatoes in concentric circles around the skillet. Season the potatoes with salt and pepper, then arrange an even layer of caramelized onions on top of the potatoes. Season with salt and pepper.
• In a medium bowl, combine the Gruyere and mozzarella and reserve half for later use. Sprinkle on a layer of the remaining cheese mixture over the onions. Repeat the layers until all the ingredients (not including the reserved cheese) have been used. Press down firmly on the layers to flatten.
• In a large bowl or measuring cup, combine the heavy cream and beef stock and pour over the gratin. Cover the skillet with foil and place on a sheet pan. Bake the potatoes, covered, until the top and edges have begun to brown and the potatoes are tender, 1 hour 15 to 1 hour 30 minutes. You can test by inserting a knife into the potatoes; if it goes in and comes out without resistance, then the potatoes are done.
• Remove the skillet from the oven, remove the foil and turn the broiler on high. Combine the croutons and French fried onions. Cover the gratin with a layer of the crouton mixture followed by the remaining cheese. Broil until golden brown and bubbly, 5 to 8 minutes. Serve and enjoy!

FRENCH ONION SOUP GRATINéE

Steps:

• Melt margarine in Dutch oven or large saucepan over low heat. Add onions; cook 15 minutes or until onions are golden brown and tender, stirring occasionally.
• Add broth, bouillon cube, Worcestershire sauce and pepper. Bring to a boil. Reduce heat; cover and simmer 20 to 25 minutes.
• Meanwhile, in medium bowl, combine cheeses.
• To serve, place 6 ovenproof bowls on cookie sheet for ease in broiling. Ladle soup into bowls. Top each with slice of toasted bread; sprinkle each with about 2 tablespoons cheese mixture. Broil about 3 to 5 inches from heat for 1 to 3 minutes or until cheese is bubbly.

FRENCH ONION PIZZA AU GRATIN

Steps:

• In a large skillet, saute onion with brown sugar in 1 tablespoon oil until softened. Reduce heat to medium-low; cook, stirring occasionally, for 30 minutes or until deep golden brown. Stir in vinegar and garlic. Remove from the heat; add bourbon if desired. Continue cooking until liquid is nearly evaporated., In another skillet, saute mushrooms in remaining oil until tender; add roast beef and heat through., Place crust on a pizza pan; spread with French onion dip. Layer with mozzarella cheese, onion mixture, red pepper, mushroom mixture and Gruyere cheese., Bake at 425° for 10-15 minutes or until cheese is melted. Sprinkle with rosemary.

FRENCH ONION SOUP GRATINÉE

Steps:

• In a large saucepan over medium-high heat, melt butter and add oil. Add onions, garlic and sea salt; sauté for 2 minutes. Add pepper, stir, reduce heat to medium and cover; cook for 8 minutes, stirring every couple minutes. Remove lid, reduce heat to medium-low and continue cooking for another 10 minutes, stirring often.
• Pour Marsala wine and continue stirring; cook until wine has almost evaporated. Pour beef broth and vegetable broth; bring to a simmer. Add thyme, garlic salt and bay leaf; cook for 15 minutes. When ready to serve, remove thyme and bay leaf.
• Preheat broiler and place rack on second row from the top. Place bread (cut slices to fit your bowl) on a baking sheet and toast. Remove from the heat, flip over and return to oven. When almost done, sprinkle cheese on two slices. Return to oven and cook until melted.
• Place each toast with cheese at the bottom of the soup bowl. Ladle beef broth over and then place toast on top. Place two slices per bowl, sprinkle the remaining cheese over and transfer bowls under the broiler. Cook until cheese is melted and browned, about 3-4 minutes.
• Note: For a non-alcohol version, use sherry vinegar.

FRENCH ONION SOUP WITH CROUTONS AU GRATIN

Steps:

• I a medium sauscepan, melt butter over medium-low heat; sauté mushrooms, onion and thyme, if using for 10-12 minutes or until lightly csaramelized.
• Stir in flour to absorb butter; slowly stir in cream, Increase heat to high, sitr in stock and bring to a boil. Reduce heat and simmer, stirring occasionally, for 20 minutes or until flavours are blended. (to make ahead, prepare the soup up to this point, let cool and refrigerate in an airtight container for up to 1 day. Reheat gently until hot and proceed as follows).
• Lightly toast baguette slices in a toaster; set aside. Preheat broiler. Place ovenproof soup bowls on baking sheet and ladle soup into bowls. Top each bowl with two baguette slices and sprinkle with Gruyère and blue cheeses. Broil for about 2 minutes or until cheese is lightly browned and bubbly. Place bowls on serving plates with chopped chives. Be sure to warn your guests the bowl is ultra hot.