Granny'S Walnut Cake
["1 box Duncan Hines yellow cake", "2 pkg. black walnuts", "1 big tub Cool Whip"]
["Chop the walnuts into small pieces.", "Prepare cake mix as directed; fold in walnut pieces.", "Bake according to directions in 8-inch round pans.", "Allow cake to cool completely before frosting. Generously spread Cool Whip on cake."]
["cake", "black walnuts"]