In a medium bowl, whisk together the pudding mix and milk and allow to set up.
2 3.4 Ounce Packages Instant Vanilla Pudding, 3 Cups milk
Fold in the defrosted non-dairy whipped topping.
8 ounces non-dairy whipped topping
Spray the inside of a 9 x 13 baking dish with non-stick pan spray, arrange graham cracker squares in a single layer on the bottom of the side. Break crackers to fit if needed.
2 14.4 Ounce Boxes graham crackers
Spread half of the pudding mixture over the crackers.
Layer another layer of graham crackers over the pudding mixture.
Top with the other half of the pudding mixture on top of crackers, be sure to spread edge to edge in an even layer.
Top with a final layer of graham crackers, adding broken crackers to fill in any space.
Chill in the fridge for about an hour to allow pudding to set.