- 1 cup butter, softened
- 1 cup sugar
- 4 large eggs
- 1 teaspoon vanilla extract
- 1 cup all-purpose flour
- 1/4 cup unsweetened cocoa powder
- 1/2 teaspoon baking powder
- 1/4 teaspoon salt
- Chocolate Frosting, recipe follows
- Whipped cream, for topping, optional
Preheat oven to 350 degrees F. Line 9-inch baking pan with heavy-duty aluminum foil.
In a large bowl, combine butter and sugar. Beat at medium speed with an electric mixer until fluffy. Add eggs, 1 at a time, beating well after each addition. Beat in vanilla extract.
In a small bowl, combine flour, cocoa, baking powder, and salt. Gradually add to butter mixture, beating until combined. Spoon batter into prepared pan.
Bake for 22 minutes or until a wooden pick inserted in center comes out clean. Spread chocolate frosting over hot cake. Let cool completely. Cut into squares and serve with whipped cream, if desired.