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stoneware pan with a chocolate frosted cake with sprinkles
5 from 3 votes

Chocolate Sheet Cake with Fluffy Chocolate Frosting

An easy and delicious chocolate sheet cake recipe with a frosting that's not as sweet as other sheet cake recipes.

Course Dessert
Keyword chocolate, chocolate cake, dessert, sheet cake
Prep Time 25 minutes
Cook Time 20 minutes
Servings 16 pieces
Author Kristen


For the cake:

  • cooking spray to prepare pan for baking
  • 2 cups granulated sugar
  • 2 cups all-purpose flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1/2 cup salted butter cubed
  • 1/2 cup cocoa powder
  • 1 cup hot brewed strong coffee or brewed espresso
  • 2 large eggs
  • 1/2 cup buttermilk or 1/2 cup milk plus one teaspoon white vinegar
  • 1 teaspoon vanilla extract

For the frosting:

  • 1/2 cup butter room temperature
  • 1 cup powdered sugar
  • 1 pinch salt
  • 1-2 tablespoons half and half cream
  • 1/2 teaspoon vanilla extract
  • 3 ounces semi-sweet chocolate melted and cooled


For the chocolate cake:

  1. Preheat the oven to 375°F and prepare a 9x13 inch or 15x10-x1-inch baking pan with cooking spray.

  2. In a medium bowl, whisk together sugar, flour, baking soda and salt.

  3. Add the cocoa powder, butter and hot coffee/espresso to a small saucepan. Bring to a boil, stirring the entire time. Once the mixture starts to boil, remove from heat and add stir into the dry mixture and mix well.

  4. Next, in a separate bowl, whisk the eggs, buttermilk and vanila together. Stir into the cocoa mixture until well incorporated. Batter will be very thin.

  5. Pour batter into the prepared cake pan and bake for 20 minutes or until a toothpick entered into the center of the cake comes out clean. Let cool.

For the Fluffy Chocolate Frosting

  1. In the bowl of an electric mixture, beat the butter and sugar together at medium speed until smooth.

  2. Reduce the speed of your mixer and slowly add in the salt, cream and vanilla. Blend until well incorporated, scraping down the sides of the bowl as needed.

  3. Finally, slowly pour in the melted chocolate. Increase the speed of your mixer to medium and mix for 1-2 minutes until frosting is fluffy. If you find that your frosting is too thick, add extra half and half, 1 teaspoon at a time until desired consistency is reached.

  4. Frost on the cooled cake, slice and enjoy!

Recipe Notes

Adapted from Taste of Home Chocolate Sheet Cake Recipe.