The ingredients are on the conveyor belt and eventually get to the exit on their own, so your main concern is keeping the bombs at bay until all the ingredients can get to the exit.
Making matches on the conveyor belt in the far left column can speed up the ingredients' journey to the exit since candies do not respawn in that column. This is also necessary because 32 moves are not enough to get all three ingredients to the exit, since it takes one ingredient 12 moves to reach it, assuming no candies were removed there.
Do not remove the ingredients from the conveyor belt. Doing so will turn a supposedly easy stage into an almost impossible one.