Ingredients
1/2 cup butter, softened1 cup sugar1 large egg1 teaspoon vanilla extract1-1/2 cups mashed ripe bananas (about 3 medium)1-1/2 cups all-purpose flour1 teaspoon baking powder1 teaspoon baking soda1/2 teaspoon salt1/4 cup baking cocoa
Preparation
In a large bowl, cream butter and sugar until light and fluffy. Beat in egg and vanilla. Stir in the bananas. Combine the flour, baking powder, baking soda and salt; add to creamed mixture and mix well.
Divide batter in half. Add cocoa to half; spread into a greased 13x9-in. baking pan. Spoon remaining batter on top and, if desired, swirl with a knife to marble batter.
Bake at 350° until a toothpick inserted in the center comes out clean, about 25 minutes. Cool on a wire rack.
