Blend all ingredients for cake. Beat for 2 minutes. ... Mix first four frosting ingredients, beat 1 to 2 ... in Cool Whip. Frost cake. Crush the Heath bars (helps to freeze them first) ... cake. Refrigerate to store.
Put mix into a large ... inch pan. Bake cake as directed on package for the baking time. FROSTING: Cream butter; add powdered ... sprinkle broken Heath bars on top.