Frosting:
1/2 cup butter or margarine, softened
1 pkg (8 oz) cream cheese, softened
4 cups confectioner's sugar
2 tsp vanilla extract

In a mixing bowl, cream butter & sugar.
Beat in eggs, bananas and vanilla.
Combine the flour, baking soda and salt.
Add to creamed mixture and mix well.
Pour into a greased 15x10x1" baking pan.
Bake at 350° for 25 minutes or until bars test done.
Cool.

For frosting, cream butter and cream cheese in a mixing bowl.
Gradually add confectioner's sugar and vanilla;
beat well. Spread over bars.