1 c Flour, all purpose 1/3 c Coca, unsweetened 1/4 c Nonfat dry milk powder 1/4 ts Baking soda 1/4 ts Salt 1 ea Large very ripe banana 1 c Sugar 2 ea Large egg whites 1/4 c Buttermilk 1 ts Vanilla Preheat oven 350F. Coat 9 in. 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 comes out clean. Cut into 2 in. squares.