After your level off a cake or carve it, keep the scraps. Put them in a plastic baggie, get as much air out as you can, and freeze. When you need a quick treat, use the cake scraps to make cake balls or cake pops! Great place to use leftover buttercream you dont know what to do with (I get left with colored buttercream I may not know what to do with otherwise so cake balls/pops are a great way to use scraps & leftover buttercream).
So how do you make cake balls/pops?
Crumble room-temperature cake.
mix with frosting (canned or homemade)
Roll mix into 1" balls & lay on cookie sheet.
chill for several hours (you can freeze if you're in a hurry)
melt chocolate (or other flavor bark)
roll balls in bark and lay on waxed paper. If doing pops place sticks and balls and dip into bark and lay on wax paper.