A modified version of "Frosted Banana Bars" from the Low-Fat, Low-Cholesterol Betty Crocker Cookbook"....
- Heat oven to 375'.
- Spray square pan, 9x9x2 with nonstick cooking spray.
- Beat sugar, sour cream, margarine & egg whites in large bowl on low speed (about 1 min).
- Beat in bananas and vanilla on low speed (30 sec).
- Beat in flour, salt & baking soda on medium speed (1 min), spread in pan. Bake 20-25 minutes or until light brown.