Quick, easy, tasty, and it seems like it should be a lot more complicated than it is.
3 packages french vanilla pudding mix
3 cups milk
16 oz whipped cream
1 box graham crackers
1 tub chocolate fudge frosting
Mix milk and pudding; when fully blended, fold in whipped cream.
Layer graham crackers across the bottom of a 9x13 pan. Pour half the pudding on top. Add another layer of crackers, another of pudding, and top off with graham crackers again.
Microwave the frosting for about 45 seconds or until smooth. Pour atop the crackers.
Refrigerate until set.
No telling how many this serves as it usually ends up all gone no matter how many or few people eat it.