1 cup ripe bananas, mashed
1 cup granulated sugar
2 cups all-purpose flour
8 ounces sour cream
1/4 cup butter, melted
2 teaspoons vanilla extract
1 teaspoon baking powder
1/2 teaspoon baking soda
2 eggs

Cream butter and sugar together.  Add sour cream, eggs, and vanilla extract and mix well. Slowly add flour, baking powder and baking soda and continue mixing. Pour into a greased 13 x 9 inch baking pan. Bake at 350 degrees F for 25 minutes. Cool before frosting.

Frosting
8 ounces cream cheese, softened
1/4 cup butter, softened
1 teaspoon vanilla extract
2 cups confectioners' sugar

Combine all ingredients, and beat with a hand mixer until desired consistency is reached. You may need to add more confectioners' sugar. Frost bars, and slice and serve. Store in the refrigerator.