Start chipping away at the frosting to reach the colour bombs. Then use special candies to remove the liquorice locks and activate them. This may be the hardest step in this level.
After the first colour bomb is collected, the game gets much easier as there is an absence of yet another candy colour. There is a very likely probability that another colour bomb will come down cascading.
Blue candies will usually take care of themselves. However, using a colour bomb on a blue candy will help out the order a lot.