CHOCOLATE SHEET CAKE WITH VANILLA BUTTERCREAM

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Chocolate Sheet Cake with Vanilla Buttercream image

Cocoa powder and melted chocolate give this classic Chocolate Sheet Cake with Vanilla Buttercream deep, well-rounded flavor. Inspired by devil's food cake, it's a party-perfect dessert that's rich but not overly sweet.

Provided by Martha Stewart

Categories     Food & Cooking     Dessert & Treats Recipes     Cake Recipes     Fillings & Frostings     Buttercream Frosting Recipes

Time 1h10m

Yield Serves 12 to 16

Number Of Ingredients 14

1 1/2 sticks unsalted butter, room temperature, plus more for pan
1/2 cup boiling water
1/3 cup natural cocoa powder
3 ounces semisweet chocolate, finely chopped (1/2 cup)
2 cups unbleached all-purpose flour
1 teaspoon baking powder
1/2 teaspoon baking soda
1 teaspoon kosher salt
1 1/2 cups sugar
2 large eggs, room temperature
2 teaspoons pure vanilla extract
1 cup sour cream
1/2 recipe Vanilla Swiss-Meringue Buttercream
Chocolate curls, for serving (optional; see note, above)

Steps:

  • Preheat oven to 350 degrees. Butter a 9-by-13-inch baking pan. Line bottom with parchment; butter parchment. Stir together boiling water, cocoa, and chocolate; let cool 10 minutes. Meanwhile, whisk together flour, baking powder, baking soda, and salt in another bowl.
  • Beat butter with sugar on medium-high speed until fluffy, 2 to 3 minutes. Beat in eggs, one at a time, beating to combine after each addition and scraping down sides of bowl as needed. Beat in vanilla, then chocolate mixture. Reduce speed to low; beat in flour mixture in two batches, alternating with sour cream, until just combined. Scrape batter into prepared pan, smoothing top with an offset spatula.
  • Bake until a tester inserted in center comes out with a few moist crumbs, 35 to 40 minutes (top will not spring back). Let cool in pan 10 minutes. Invert onto a wire rack and remove parchment; let cool completely. Cake can be made up to 1 day ahead and stored at room temperature, wrapped in plastic.
  • Spread buttercream evenly over top and sides of cake. Sprinkle with chocolate curls. (Leftovers can be refrigerated, wrapped in plastic, up to 3 days; return to room temperature before serving.)

Travis Cargle Jr
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This cake is so easy to make, and it's always a hit with my friends and family.


Anul Bnaa
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I'm allergic to chocolate, so I substituted cocoa powder for the chocolate chips. It turned out great!


Weasel High
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This recipe is a great starting point, but I like to add a few extra ingredients to make it my own. I usually add a cup of chopped walnuts and a teaspoon of cinnamon to the batter.


Joy Oziri
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This cake is definitely a keeper! I'll be making it again and again.


ILILLEE MEDIA
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I followed the recipe exactly, but my cake didn't turn out as fluffy as I expected. Maybe I over-mixed the batter?


Emma Malch
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The cake was a little dry, but the frosting was delicious.


KIPKIRUI HOSEAH
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This cake was a bit too sweet for my taste, but my family loved it. I might try reducing the amount of sugar next time.


Angeline Shunje
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I'm not a big baker, but this recipe was easy to follow and the results were amazing. The cake was perfect for a special occasion.


Mary Dottaviano
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This is the best chocolate sheet cake I've ever had. The cake is moist and fluffy, and the frosting is creamy and smooth.


mery jesintha
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I made this cake for my son's birthday party, and it was a huge success. The kids loved it, and the adults couldn't get enough of it either.


Leo Arce
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This cake is so good! The chocolate flavor is rich and decadent, and the vanilla buttercream frosting is the perfect complement.


M amjad g
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I've made this cake several times now, and it's always a crowd-pleaser. The recipe is easy to follow, and the results are always delicious.


Awais Bukhari
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This chocolate sheet cake with vanilla buttercream was a hit at my party! The cake was moist and fluffy, and the frosting was light and creamy. Everyone loved it.