Classic Chocolate Sheet Cake
A rich and moist chocolate sheet cake that’s perfect for any occasion. This easy-to-make cake features a tender crumb and a luscious chocolate frosting, baked in a single sheet pan for simple serving.
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
- Yield: 12
Ingredients
2 cups all-purpose flour
2 cups granulated sugar
3/4 cup unsweetened cocoa powder
1 1/2 teaspoons baking powder
1 1/2 teaspoons baking soda
1 teaspoon salt
1 cup buttermilk, room temperature
1/2 cup vegetable oil
2 large eggs, room temperature
2 teaspoons vanilla extract
1 cup boiling water
1/2 cup unsalted butter, softened
4 cups powdered sugar
1/4 cup unsweetened cocoa powder
1/4 cup whole milk
1 teaspoon vanilla extract
Instructions
Preheat the oven to 350°F (175°C). Grease and flour a 9×13-inch sheet pan.
In a large mixing bowl, sift together the flour, granulated sugar, 3/4 cup cocoa powder, baking powder, baking soda, and salt.
Add the buttermilk, vegetable oil, eggs, and 2 teaspoons vanilla extract to the dry ingredients. Beat on medium speed until well combined.
Carefully add the boiling water to the batter and mix on low speed until fully incorporated. The batter will be thin.
Pour the batter evenly into the prepared sheet pan.
Bake for 30 minutes or until a toothpick inserted in the center comes out clean.
Remove the cake from the oven and allow it to cool completely in the pan on a wire rack.
To make the frosting, beat the softened butter in a medium bowl until creamy.
Gradually add the powdered sugar and 1/4 cup cocoa powder, alternating with the whole milk, beating until smooth and spreadable.
Stir in 1 teaspoon vanilla extract.
Spread the frosting evenly over the cooled cake.
Cut into 12 squares and serve.