- 1/2 cup margarine
- 1/2 cup shortening
- 1 cup peanut butter
- 3 tablespoons evaporated milk
- 1 teaspoon vanilla extract
- 1/2 teaspoon butter flavored extract
- 1 pound confectioners' sugar
- 2 bananas
- Combine margarine, shortening, peanut butter, milk, vanilla, and butter flavoring. Add confectioners' sugar and beat until creamy. Add more milk, if needed, 1 teaspoon at a time.
- Spread icing over one layer of a yellow cake. Slice bananas on top. Place second layer on top and frost top and sides.