5 tablespoons butter
1/2 cup granulated sugar
1/2 cup firmly packed light brown sugar
1 large egg
2 egg whites
1 teaspoon vanilla extract
2 ripe mashed bananas
1 3/4 cups all-purpose flour
1 teaspoon baking soda
1/2 teaspoon salt
1/4 teaspoon baking powder
1/2 cup heavy cream
1/2 cup chopped walnuts
Preheat oven to 350 degrees, and spray bottom of a 9 inch round pan with non-stick cooking spray.
Beat butter in a large bowl with an electric mixer until light and fluffy.
Add granulated Sugar and brown sugar; Beat until well blended.
Add egg, egg whites and vanilla; blend.
Mix in the mashed bananas, and beat the mixture on high speed for 30 seconds.
In a separate bowl, combine flour, baking soda, salt and baking powder.
Add flour mixture to butter mixture alternately with the cream, ending with the flour mixture.
Mix in the walnuts.
Pour batter evenly into prepared 9 inch round pan (or loaf pan).
Bake until golden brown and toothpick inserted near the center comes out clean (About one hour).