I guess I'm showing my age when I remember H.O. oatmeal? I don't know if that brand exists anymore, but the recipe came from the box panel and boy were they good. Nothing fancy, just pure and simple ingredients make these wonderful oatmeal cookies. HO oats were quick cook oats and that they were small and powdery in texture. Maybe that's why there was no flour in the recipe??? Since I use whole oats which are hard to stick together; I put my oats in the food processor and pulse a few times which breaks them down and makes a kind of flour out of them.