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.
This can be made ahead and frozen,
but let thaw before serving.