The area with the ingredients is isolated from the main board. You also cannot make matches to bring down the ingredients even if you can clear the frosting.
The frosting is not easy to reach and can be rather hard to break, especially the one-layered frosting and the four-layered frosting. You are forced to break these if you want to bring down the ingredients.
Only one ingredient will be on the board at the time which makes it even harder to bring down the ingredients.
25 moves is not a lot to bring down the ingredients.
Four colours will make special candy creation significantly easier.
The ingredients are worth 20,000 points, which is equal to the one star target score.
You need a vertical striped candy to clear the one-layered frosting. Make one on the conveyor belt, and wait until it is at the right place, and fire.
All other frosting can be removed by aiming colour bombs at the adjacent candies. Get as many as possible, and try to reduce the colour in the ingredient path. Then, both ingredients shall pass with ease.