Spray 9x13” pan or baking dish lightly with cooking spray.
Pour pudding into a large mixing bowl.
Add one cup half-and-half and mix well on low speed of electric mixer.
Add cream in ½ cup measures mixing well after each addition continuing on low speed of electric mixer.
Once all the cream has been added, adjust mixer to high speed and mix for about two minutes until mixture has thickened.
Add Cool Whip and stir well to combine.
Take one package of the graham crackers and spread over bottom of baking dish.
Cover with half of the chocolate pudding mixture.
Spread with another layer of graham crackers, followed by the remaining pudding mixture.
Top with the last layer of graham crackers.
Spread chocolate frosting over all.
Refrigerate a few hours before serving.