Line 9 x 13 pan with graham crackers. Mix for 2 minutes:
2 cups vanilla instant pudding
3 cups milk
Fold in:
8 ounces cool whip
Pour pudding over graham crackers and add another layer of graham crackers over pudding.
Frost with:
3 tablespoons hot milk
3 tablespoons cocoa
1/4 cup soft margarine
1 1/2 cups powdered sugar
Refrigerate over night.