Frosted Banana Bars

1/2 C Margarine, softened
1 1/2 C Sugar
2 Eggs
1 C Sour Cream (8 oz.)
1 tsp Vanilla
2 C Flour
1 tsp Baking Soda
1/4 tsp Salt
2 med Ripe Bananas, mashed (about 1 cup)

Frosting:
1 pkg Cream Cheese, softened
1/2 C Margarine, softened
2 tsp Vanilla
3 3/4 - 4 C Powdered Sugar

In a mixing bowl, cream butter and sugar. Add eggs, sour cream and vanilla. Combine flour, baking soda and salt. Gradually add to creamed mixture. Stir in bananas. Spread into a greased 15 x 10 pan. Bake at 350 for 20-25 min, until toothpick poked in center comes clean. Cool. For frosting, beat cream cheese, butter and vanilla. Gradually beat in enough powdered sugar to desired consistency. Frost bars and store in refrigerator. Yield: 3-4 dozen