1.Begin with your cake which has been chilled in the freezer.
With a large serrated bread knife cut the cake through the middle, making layers approximately 1 inch thick.
2.Place a layer of cake on your cake plate or whatever you will be using to serve the cake on. Spread the ice cream onto the layer of cake -- it should spread much like peanut butter.
If your cake layer is not cold enough, it may tear during this process.
3.Spread the ice cream until it is smooth on top and about an inch thick. Place another layer of cake over the ice cream and smooth the edges so there are no lumps of ice cream hanging out the sides.
4.Repeat the steps until you have a third layer of cake on top.
Put the cake in the freezer for 20 to 30 minutes.
5.Decorate with whip cream, candy or fruit and serve.