Banana Pudding Bars

2 - 3 small, ripe bananas

1 pkg.  yellow cake mix

1 pkg. (4-serving size) instant vanilla pudding

4 eggs

1 cup water

1/4 cup vegetable oil

Slice bananas into mixing bowl and mash.  Add remaining ingredients.  Blend, then beat at medium speed for two minutes.  Pour into well-greased jelly roll pan.  Bake at 350 for approximately 20 minutes.  Sprinkle with powdered sugar or spread with a thin layer of powdered sugar frosting.

Frosting:

2 cups powdered sugar

3 T. milk

1tsp. vanilla

Mix together and spread over cooled cake.