Core apples and slice into small bite-size pieces. Somewhere between 1/2" - 1". Also chop the Snickers candybars into small bite-size pieces.
In a big bowl mix the apples and Snickers with the Cool-Whip until everything's coated.
Sprinkle with cinnamon and mix well. Add however much looks good, 2 tsps is an approxiate amount, but you don't want to overpower the other flavors. If the Cool-Whip starts to look brown you've probably added too much.