Evenly place 1/4th of the whipped topping on one slice. Top with 1/4th of the banana slices, followed by the other slice.
Repeat with the remaining VitaTops, whipped topping, and banana slices. Freeze them until solid, about 1 hour. So good!
PER SERVING (1 whoopie pie): 150 calories, 2g fat, 155mg sodium, 34g carbs, 9g fiber, 18.5g sugars, 4g protein