This was absolutely fabulous!! I found this recipe at My Sister's Kitchen and it is definitely a keeper. Everyone one that tried them loved them, even my children.
1/2 c. butter softened
1 1/2 c. sugar
2 eggs
1 c. sour cream
1 t. vanilla extract
2 c. white flour
1 t. baking soda
1/4 t. salt
1 c. mashed, ripe bananas
* Preheat oven to 350 degrees. Grease a jelly roll pan (10x15 inch). In a large bowl, cream butter and sugar until smooth, about 2-3 minutes. Beat in eggs, one at a time. Stir in sour cream and vanilla. In medium bowl, combine flour, baking soda and salt. Stir into batter and then mix in mashed banans. Spread evenly into pan. Bake 20-25 minutes or until toothpick inserted into center comes out clean. Allow to cool completely before frosting.