I recommend using rolled oats for this recipe. Quick oats cook too quickly, and your other flavors won't have a chance to meld at all in the pan. Steel cut oats, on the other hand, take too long to cook. They also use more water than rolled oats do. Your pumpkin oatmeal will be a mess if you substitute steel cut oats without adjusting the rest of the recipe to accommodate. If you want a steel cut oats recipe, try my Instant Pot apple steel cut oats instead!