Use the mystery candies provided to help you destroy most of the icing.
Use vertical striped candies to hit the mystery candies which will hopefully spawn good things like wrapped candies.
Also colour bombs would be good. Try to mix them with the most abundant mystery candy colour.
Chip away at the icing with wrapped candies, striped candies and anything else damaging
The wrapped + wrapped candy, wrapped + striped candy and colour bomb + striped candy combinations can achieve this. The colour bomb + colour bomb combination is also very effective, but with six candy colours those combinations will be hard to make without mystery candies.
If mystery candies bring you good things, this level can be passed pretty easily.