In a blender or a food processor, add 24 oreos and pulse until it becomes a wet powder resembling set sand. This can alternatively be done by hand in a large ziplock bag with a rolling pin.
Melt ¼ cup butter and mix with the oreo crumbs.
Press evenly into a 9 inch pie pan and put in the fridge to chill while you prepare the filling.
Filling
In a medium bowl, whisk together the oreo pudding powder and the half and half. Set aside for 5 minutes or so, allowing the pudding to thicken up.
Fold in the chopped oreos and pour into your prepared pie crust.
Topping
Beat the cream and powdered sugar until stiff peaks form. Pipe or spread across the top of your pie. Add oreos for garnish.
Chill the pie in the fridge for at least 6 hours, or overnight, before serving.