Most baked oatmeal recipes are dense, like a baked oatmeal cookie. This baked oatmeal souffle truly lives up to its souffle name. First, the oatmeal is cooked on the stove. Then you add flavorings, egg yolks and finally beaten egg whites. The result is a baked oatmeal souffle that is as light and airy as any souffle. I use demerara or turbinado sugar on top of this baked oatmeal souffle, because the sugar crystals are bigger than regular sugar, giving the top of this baked oatmeal souffle great color, texture and flavor.