Make the pudding according to the directions. Set aside to cool.
Crush the graham crackers in a large bag.
Sprinkle 1/3 of the graham crackers on the bottom of a casserole dish.
Pour 1/2 of the pudding over the graham crackers.
Sprinkle 1/3 of the graham crackers over the pudding.
Add the candy bars over the graham crackers.
Pour the rest of the pudding over the candy bars.
Sprinkle the remaining graham crackers over the pudding.
Cover with marshmallows.
Broil for a very short time, until marshmallow tops are golden brown.
Serve warm or cold.