Here's the deal--most fat free foods have extra sugars to give them flavor. Most no-sugar foods are made with unhealthy fats. You're better off eating real food (home-made cookies, with butter) that satisfy you with a little bit than eating prepared, processed junk that has no flavor.
Carbs aren't the enemy for a real-life eating plan. Healthy fats (a little bit of saturated fat, like butter or animal fat) isn't going to kill you unless your cholesteral numbers are way out of whack.
Personally, I'd rather a scoop of full-fat, real ice cream than a whole bowl full of the ersatz stuff. If you caon't control your portions, maybe you need to eat something that doesn't trigger you.