- 2 cups white sugar
- 1 3/4 cups all-purpose flour, unsifted
- 3/4 cup unsweetened cocoa powder
- 2 teaspoons baking soda
- 1 teaspoon baking powder
- 1 teaspoon salt
- 1 cup buttermilk
- 1/2 cup vegetable oil
- 1/2 cup strong black coffee
- 2 eggs
- 1 teaspoon vanilla extract
- Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 9×13-inch baking pan.
- Combine sugar, flour, cocoa powder, baking soda, baking powder, and salt in a large bowl.
- Mix buttermilk, oil, coffee, eggs, and vanilla extract together in a bowl. Pour over sugar mixture in the large bowl; beat with an electric mixer on medium speed until batter is smooth and thin, about 2 minutes. Pour batter into the prepared baking pan.
- Bake in the preheated oven until a toothpick inserted into the center comes out clean, about 35 minutes.