HowMix pudding mix, milk, and Cool Whip in a medium bowl.
Place a single layer of graham cracker squares on the bottom of a 9 x 13 inch (23 x 33 cm) baking dish. You may need to space them out a bit to get enough crackers to cover the bottom of the dish.
Spread half of the pudding mixture on top of the biscuits.
Place another layer of graham crackers on top of the pudding mixture.
Then, pour the other half of the pudding mixture over the top of the cookies.
Top with a final layer of graham crackers.
Cover the pan with plastic wrap and refrigerate for about 30 minutes to an hour to allow the pudding to set.