Chocolate Sheet Cake is a beloved dessert that has graced family gatherings, celebrations, and potlucks for generations. This delightful cake is not only easy to make but also exceptionally moist and rich, showcasing the deep flavor of cocoa powder. Its origins can be traced back to the Southern United States, where sheet cakes became popular for their simplicity and ability to serve a crowd. One bite of this decadent treat transports you to a world of chocolate bliss, making it the perfect centerpiece for any occasion, whether it's a birthday, a holiday gathering, or just a casual weekend treat.
Ingredients
Scale:
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, at room temperature
1/2 cup vegetable oil
2 large eggs, at room temperature
2 teaspoons pure vanilla extract
1 cup boiling water
1/2 cup unsalted butter, softened
2/3 cup unsweetened cocoa powder (for frosting)
3 cups powdered sugar
1/3 cup milk
1 teaspoon pure vanilla extract (for frosting)
Instructions
Preheat your oven to 350°F (175°C) and grease an 18x13 inch baking sheet with butter or non-stick spray.
In a large mixing bowl, combine the flour, sugar, cocoa powder, baking powder, baking soda, and salt. Whisk until fully incorporated.
In another bowl, whisk together the buttermilk, vegetable oil, eggs, and vanilla extract until smooth. Pour this mixture into the dry ingredients and mix until just combined.
Carefully add the boiling water to the batter, stirring gently to combine.
Pour the batter into the prepared baking sheet, spreading it evenly. Bake for 30-35 minutes, or until a toothpick inserted in the center comes out clean.
While the cake is baking, prepare the homemade chocolate frosting by beating the softened butter until creamy. Gradually add cocoa powder and powdered sugar, alternating with milk, until smooth. Stir in vanilla extract.
Once the cake is baked, let it cool in the pan for about 10-15 minutes, then transfer to a wire rack to cool completely.
Spread the chocolate frosting generously over the top of the cooled cake.
