Unlock the chests as soon as possible by matching the keys.
While clearing the keys, try to clear the two-layered icing on the bottom and the three-layered icing below the middle ingredients. A colour bomb combined with a wrapped candy is an ideal combination to clear the icing, at the same time getting a lot of points.
When the ingredients are unlocked, bring down the two-sided ingredients to the conveyor belt. The middle ingredient has a straight path down to the exit; you just need to clear the icing in the path.
When the ingredients on the conveyor belt are near the exit (are in the third or seventh column), clear the candies on the bottom. This will bring down the ingredients.