On top of the ice cream sandwiches, spread 1/2 of the Cool Whip topping and sprinkle 1/2 of the chopped Butterfinger candy bars. FREEZE.
Spread 1/2 jar of ice cream topping on top of the candy bars. FREEZE.
(I used 1/2 jar of the caramel syrup.)
Okay, you can STOP right here.