Thaw Cool Whip ahead of time in the refrigerator (over night)

Prepare cake mix according to directions. Bake in a greased and floured 9 x 13" pan as indicated on the box. Cool.

Prick top of cake with a fork and pour the Kahlua liquor over entire cake. Let stand about 15 minutes to soak in.

Just before ready to assemble, prepare pudding according to package directions, using a whisk to stir by hand until smooth.

Crumble one-third of the cake into small pieces and layer in a large trifle bowl as follows: 1/3 cake, 1/3 pudding, 1/3 whipped topping and 2 crushed Heath bars.

Repeat until you have 3 layers ending with the last 2 crushed Heath bars on top.