* 2 slightly beaten egg whites may be substituted. Heat oven to 350° lightly spray 8-inch square baking pan with light vegetable cooking spray. ln medium saucepan over low heat, melt spread. Add sugar; stir until well blended. Remove from heat; stir in cocoa and vanilla. Add egg substitute; stir to blend. Stir in flour and walnuts. Pour batter into prepared pan. Bake 25 minutes pr until edges begin to, pu(f away from sides of pan. Cool in pan, wire rack.,Sprinkle powdered sugar over top. Cut into 16 squares. Nutritional Info: 100 calories, 3 g fat, 0 mg chol, 55 mg sodium.