Preheat your oven to 350 degrees.
Finely crush your oreo cookies either using a food processor or with a rolling pin and a plastic bag, until cookies are crumbs.
Melt your butter in the microwave and combine your Oreo crumbs and butter in a medium sized bowl.
Pour your crumb mixture into the bottom of a pie pan and press firmly and evenly into the bottom and up the sides of the pan.
Bake for about 12 minutes. Remove from oven and allow to cool completely.
Combine pudding mixes and 2 cups cold milk in a medium sized bowl and whisk until well mixed for about 2 minutes.
Pour in about half of the pudding into the crust.
Stir about half of the cool whip into the remaining pudding and pour over the chocolate layer.
Refrigerate a few hours until pudding is set, or ready to serve.
Top with additional cool whip.