cake mix - any flavor (and ingredients needed to make cake)
1/2 gallon or less of any flavor ice cream
Icing of your choice (homemade or store bought)

Preheat oven as directed on cake mix.

Follow cake recipe.

Bake in 2 9-inch pans. Freeze cake in pans. Put aluminum foil in another 9-inch pan. Soften ice cream and smash it in to fill 9-inch pan. Freeze ice cream solid. Put ice cream layer between cake layers and ice with frosting. Serve frozen.