Cream together butter, sugar, and ... buttermilk. Then add bananas, flavoring, and nuts. Bake ... dadd powdered sugar. Frost while bars are still warm. For caramel frosting, use 1/2 c. brow sugar instead of white sugar.
Beat egg whites until stiff ... yolks and mashed banana. Dissolve baking soda in ... about 5 minutes. Frost banana cake putting frosting and sliced bananas between layers.