Preheat the oven to 350 degrees.
Place 18 Oreo cookies in the Blender or Food Processor, using the pulse button to crush the Oreos to a fine crumb consistency.
In a medium bowl, mix your cookie crumbs and melted butter. Stir completely.
Spread the Oreo crumbs in the bottom of a 9'' pie pan and up the sides.
Bake for 7 minutes in the preheat oven. Remove and allow to cool.
Pour 5oz of the hot fudge syrup and spread all around the crust.
Remove the ice cream from the freezer and soften enough to mix (about 5 minutes)
In a large bowl, place the ice cream and 4 oz of the cool whip, and 5 additional Oreo cookies broken in half. Fold together with a large wooden spoon.
Spread the softened ice cream into the pie plate.
Wrap pie completely with plastic wrap and then foil. Freeze to harden for 3 to 4 hours.
Remove pie from freezer and spread remaining cool whip over the top.
Crush 1 remaining Oreo cookie and sprinkle crumbs over the top of pie. Drizzle with hot fudge.
Slice and enjoy.