Prepare cake according to directions. Combine both packages of Jell-O Cheesecake pudding with 3 cups of milk and 1 cup of Kahlua. Fold in one 8 oz container of Cool Whip into pudding. Chill.
When cake is cool crumble 1/8 cake over the bottom of a glass bowl, layer with Jell-O mixture then another 1/8 layer of cake then Cool Whip and repeat for 4-5 layers.
Top with remaining pudding and Cool Whip. Shave some of the chocolate bar over top and chill.
Serve. (Tastes best when prepared several hours ahead.)
Submitted by: Kathy Threatt