As the ingredients spawn, try to keep them on the belt, and only drop them into the exit columns. Try to avoid letting them fall into the columns with icing, as there is no exit there; ingredients that fall there must be moved sideways, which is difficult.
Stack ingredients into same exit columns if possible.
Use vertical striped candies to drop the ingredients. With the liquorice swirl there, you will need two hits: the first hit will clear the liquorice swirl, leaving the ingredient to block the chocolate; the second hit will clear the chocolate and drop all the ingredients.
Candy bombs are not a huge threat, but be watchful of them, so as to clear any that get close to zero.