In a blender or food processor, finely grind the candy bars. Alternately, put them in a sealed bag and beat them with a mallet until crushed.

In a large bowl, beat the cream cheese and marshmallow fluff until light and fluffy. Fold in the cool whip and all but a handful of the candy crumbs.

Spoon dip into a serving dish and sprinkle the remaining candy over the top.

Serve with apple slices and graham crackers.