I have seen plenty of flapjack recipes that call for quick cooking rolls oats (they're sometimes also called quick oats or quick-cook rolled oats). However, I developed this recipe specifically using old-fashioned rolled oats, so that's what I recommend using here for best results. If you're wondering what the heck are quick cooking rolled oats, you're not alone - oatmeal is surprisingly confusing! With steel cut oats, old-fashioned rolled oats, quick oats, and instant oats on grocery store shelves, it starts to be a little much. The difference between these different types of oats is based on how processed they are. The thing to remember for this recipe is to use old-fashioned rolled oats (which are what I always keep stocked in my pantry because they make a great oatmeal bowl for breakfast). And don't forget to pulse them three times (one second per pulse) in a food processor before using for the perfect texture.