Banana Cream Bars

These are like HEAVEN!!! So, so, so GOOD!! My husband says they are cross between carrot cake and banana bread. The frosting is like that on carrot cake and cake like banana bread.

1 stick (1/2 cup) butter, at room temperature
1-1/2 cups sugar
2 large eggs
2 tsp. vanilla

3/4 cup sour cream
2 cups flour
1/4 tsp salt
1 tsp baking soda

2 large, or 3 medium-sized, very ripened bananas, mashed

Frosting
3 oz. cream cheese, room temperature
8 Tbsp. butter, softened
1 Tbsp. milk
1 tsp. vanilla
2 cups confectioners sugar
1/2 cup chopped nuts, optional

1. in a large electric mixer bowl, cream 1 stick of butter and 1-1/2 cups sugar together.
2. Add the unbeaten eggs, one at a time, beat each one throughly. Add 2 tsp. vanilla and sour cream.
3. In a seperate mixing bowl combine flour, baking soda, and salt. Add alternating with mashed bananas to the creamed ingredients. Mix well after each addition.
4. Spoon into a greased 15 x 10 x1-in. baking pan. bake at 350 degrees for 20-25 minutes, or until toothpick inserted comes out clean. Cool on wire racks.
5. Meanwhile, make frosting by beating together cream cheese, 6 Tbsp. butter, milk, 1 tsp. vanilla, and confectioners sugar. Spread over cooled bars and sprinkle with nuts if you wish.