Banana Bars with Cream Cheese Frosting

1/2 C butter
1 1/2 C white sugar
2 eggs
1 C sour cream
1 tsp vanilla extract
2 C flour
1 tsp. baking soda
1/4 tsp salt
1 C mashed ripe bananas (I use 3 medium bananas)

Bake in a 9X13 at 350 degrees for 30 minutes. Cool, frost, and enjoy!

Cream cheese frosting
4 oz cream cheese
2 TB milk
1 C powdered sugar