Preheat oven to 350 F. Coat 9 inch square baking pan with vegetable cooking spray. Combine flour, cocoa, milk powder, baking soda and salt in bowl. Puree banana, sugar, egg whites, buttermilk and vanilla in food processor until smooth. Add dry ingredients and pulse just until blended. Pour into prepared pan. Bake 25 minutes or until toothpick inserted in center comes out just clean. Cool on wire rack. Cut into 2 inch squares. Makes 16. 65 cal, 1 gm protein, 0 gm fat, 15 gm carbs, 42 mg sodium

dilute it with skim milk to buttermilk consistency. Use same amount total, ~ 1/4 cup. It's probably about 1/8 cup yogurt + 1/8 cup milk??