1 box yellow cake mix
2 eggs
1 tsp. baking soda
1 c. buttermilk

Mix these four ingredients well, add 2 mashed bananas. Bake in 3 layers, cool and frost.

FROSTING:

1 stick butter, softened, add
1 box confectioners' sugar and
1 mashed banana

You can add few nuts chopped fine. This is better to make ahead of time and freeze.