Put plastic wrap over dish and put in fridge for about 30 min to an hour to allow pudding to set.
When ready, put the tub of chocolate frosting in the microwave for about 15 seconds to soften (remove lid and aluminum foil top before microwaving).
Take out and stir frosting. It should be easily spreadable now.
Remove plastic wrap from dish and evenly spread chocolate frosting all over the top layer of graham crackers.
Place plastic wrap over top of dish and put back in fridge and let it chill overnight.
This dessert gets better over time. The graham crackers need plenty of time to soften up.
When ready, slice and serve!