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Best Ever Chocolate Sheet Cake with chocolate buttercream frosting sliced side view

Best Ever Chocolate Sheet Cake

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2 from 1 review

  • Author: Aberdeen
  • Total Time: 40 minutes
  • Yield: 12-16 Slices 1x


Simple, moist, deliciously rich chocolate cake recipe topped with light and fluffy chocolate butter cream.


Units Scale

For the Sheet Cake

  • 1 1/2 cup unbleached, all purpose flour
  • 3/4 teaspoon sea salt
  • 1 1/2 teaspoons baking soda
  • 1/2 teaspoon baking powder
  • 3/4 cup cocoa powder
  • 1 cup granulated sugar
  • 1/2 cup dark brown sugar
  • 2 large eggs, room temperature
  • 1/2 cup canola or vegetable oil
  • 2 teaspoons vanilla extract
  • 1/2 cup buttermilk, shaken
  • 3/4 cup freshly brewed coffee
  • Sprinkles, chocolate shavings for garnish

For the Chocolate Buttercream Frosting

  • 1 cup unsalted butter (2 sticks), room temperature
  • 2 cups powdered sugar
  • 1/2 cup cocoa powder
  • 1 1/2 tablespoons heavy whipping cream
  • 1 1/2 teaspoons vanilla extract (I like to use half vanilla extract and half vanilla paste)


Make the Cake Filling

  1. Preheat oven to 350˚F. Line a 9X13 inch baking dish with parchment paper. Grease with butter or spray.
  2. In a large bowl, cream together sugars, eggs, oil, and vanilla extract with a standing mixer or hand mixer until smooth, about 3 minutes.
  3. Slowly pour in coffee and whisk on a low speed.
  4. Add half of flour mixture and half of buttermilk to the egg mixture, whisk until combined. Repeat with the remaining flour and buttermilk.
  5. Pour batter into prepared pan. Bake for 25-30 minutes, until a toothpick comes out clean when inserted into the center of the cake. Set on a wire rack to cool completely (or the frosting will melt).

Make the Chocolate Buttercream Frosting

  1. In a standing mixer, whisk butter until light and creamy. Sift in powdered sugar and cocoa powder, whisk until just combined. Pour in cream and vanilla extract, whisk until completely smooth.

Assemble the Cake

  1. When the cake is completely cooled, frost cake with chocolate buttercream frosting.
  2. Garnish with sprinkles and chocolate shavings as desired. Slice and enjoy!
  • Prep Time: 10 minutes
  • Cook Time: 30 minutes