I made mine with regular lime gelatin, not sugarless, so if you don't mind the sugarless stuff, you could cut even more calories and points.
I also like Dream Whip better than Cool Whip. If you've never tried it, you should. It tastes richer and more like homemade without the extra calories and fat. I make mine with 2% milk.
Linked up with Jennifer Cooks Fusion Friday's
Key Lime Pie
1 Reduced fat graham cracker crust
1 small package lime gelatin
1/2 cup boiling water (reduce to 1/4 cup if using sugarless gelatin)
1 box (2 packages) Dream Whip, makes 4 cups prepared (reserve 1 cup for topping)
2 (6 ounce) Key Lime Pie Yogurt, fat free
In a large bowl, dissolve gelatin in boiling water. Stir in yogurt with wire whisk. Fold in whipped topping and spread into crust. Refrigerate for at least 2 hours.
To serve top with remaining whipped topping and lime zest.