Go ahead and prepare you puddings according to package instructions. Set aside. Next, spread peanut butter on Graham Crackers. Place first layer of Graham Cracker/Peanut Butter on bottom of 9x13 pan(peanut butter side up). Then spread Vanilla Pudding on top of that. Then spread cool whip(works best if soft)on top of vanilla pudding. Continue layering in order as above until there's just enough room to spread chocolate pudding on top as a finish(use chocolate pudding to top the dessert only) Use remaining Graham Crackers to garnish the top of chocolate pudding by crushing them and sprinkling them on. Refrigerate 1-2 hrs or until graham crackers are soft.
You can use any flavor Graham Cracker you wish and honestly whatever flavor Pudding you wish. I have used cinnamon crackers with cream cheese pudding and it was great. Whatever you prefer.
You can also make your puddings from scratch with this recipe if it's what you prefer. But that requires more effort and time so this is the quick version