Bake Crust in oven and cool completely on wire rack while still in pie plate.
Mix whole milk and pudding and cook over medium heat stirring constantly until mixure comes to a boil.
Set pudding aside, while still in pan
After 5 minutes stir pudding to mix, set aside again.
After 5 more minutes stir pudding again.
Pour into cooled crust and place wax paper over ONLY THE PUDDING, don't let it lay on the crust or it will get soggy.
Let the mixture come to almost room temperature and place in fridge overnight.
After well chilled, remove wax paper and top with cool whip and shaved or chopped Hershey bar.