The aforementioned Weight Watchers points are if you use non-fat Greek yogurt. Since most people on Weight Watchers are concerned with WW points, they prefer to use the lower point non-fat Greek yogurt to make 2 Ingredient Dough. If you want to use full fat Greek yogurt to make your 2 Ingredient Dough you can. Just note that the WW points won't be the same. If you're not concerned about Weight Watchers, then non-fat or full-fat Greek yogurt will both work. And, actually, you can substitute sour cream for the Greek yogurt portion and it works as well.