Instructions

  1. Spray an 8 inch square baking pan with non-stick cooking spray; set aside.
  2. In large bowl, with fork, stir together flour, sugar, cocoa, and baking powder and salt.
  3. Stir in butter, egg whites, and vanilla; mix well. Stir in walnuts.
  4. Spoon batter into prepared pan, spreading evenly. Bake at 350 degrees for 30 to 35 minutes. Let cool. Makes 8 servings.