Based on Quaker Oats' Vanishing Oatmeal Cookies Recipe. I made them a few times, and I never thought they were quite good enough. They weren't fluffy enough and they didn't have nearly enough oatmeal! I found out one day when I ran out of white flour, that whole wheat tastes great in oatmeal cookies. I like to pulse the oats in the food processor a few times so they're extra fluffy, but instant oatmeal works very well.