1 box Devil's Food cake mix, prepared according to box directions
1/2 c. Kahlua

Poke holes into top of prepared Devil's Food cake, pour over Kahlua, let set overnight.

2 boxes chocolate mousse, prepared according to box directions
1 (12 oz.) container whipped topping
12 Heath bars, crushed

Divide cake in half and crumble. Mix in 6 of the crushed Heath bars and press into bottom of springform pan. Spread half of the mouse to form a second layer. Add half of the whipped topping to form the third layer. Repeat layering process using the remaining halves of the cake/Heath bar mixture, mousse, and whipped topping. May garnish top with more crushed Heath bars, cocoa, or chocolate curls. Chill several hours before serving.