This can be made ahead and frozen, but let thaw before serving.
- Prepare a cake mix, or your favorite recipe for cake. Crumble some of it and mix it with 1/2 can or 1/2 recipe of your favorite frosting (heating the frosting to make it very soft is recommended). Press this into the bottom of a pie pan and fill it halfway. Let vanilla, chocolate or strawberry ice cream soften (not melt) in the refrigerator for 1/2 hour.
- Swirl the ice cream over the cake in the pie pan, so it looks like swirls of frosting. Put sprinkles on the top and serve.