Mix 1 cup graham cracker crumbs and 1/4 cup melted butter. Add 1 cup (6 ounces package) semi sweet chocolate pieces and 1/2 cup chopped nuts.

Sprinkle over Duncan Hines Devils Food Cake in 2 pans. Bake at 350 degrees for 30 minutes.

Cool in pans 15 minutes, remove and cool on rack crunch side up. Beat 1 cup whipping cream with 4 tablespoons sugar until stiff. Spread between layers and on sides. Chill.