Cut cake in half, crumble and press into truffle bowl. Spoon half of pudding over the cake then spoon half of Cool Whip over the pudding. Crumble 4 Heath bars over the Cool Whip. Repeat with cake, pudding, Cool Whip, crumble Heath bars over the top. Refrigerate.
Variation: Pour 1/3 cup Kahlua over each cake layer! This recipe is easy, delicious and pretty!