There seems to be an argument if quick oats and rolled oats can be changed. The problem comes in with the quick oats and why they are different. Quick oats are already precooked and are thinner than rolled oats. If you want to use quick oats instead of rolled oats, you can, however, you need to watch your cooking time. They will cook sooner than rolled oats. If you want the best results that you are sure will work and taste amazing, I would stick with the old-fashioned rolled oats. These are tried and true and will give you amazing homemade granola every time.