2 6-oz containers of yogurt (fruit or other flavor)
1 4-serving package sugar-free gelatin (flavor of your choice)
1/4 c. boiling water
1 8-oz container sugar-free Cool Whip
Add the gelatin to the boiling water in a large bowl and stir until dissolved. Add the yogurt and combine with a whisk. Add the Cool Whip and whisk again. Refrigerate until set.
You can pour this into a graham cracker crust to make a pie, if desired.