Mix Graham cracker crumbs, melted butter and sugar. Press down in 9x13 baking dish or pan and cover bottom completely. Mix first 4 ingredients together and spread over graham cracker crust.
In a mixing bowl mix pudding and milk for 5 minutes, spread over peanut butter mixture. Next spread tub of cool whip over pudding and sprinkle crushed peanut butter cups on top and freeze for an hour before serving. I like to keep mine in the freezer until 30 mins before serving and then set out to thaw a little. Enjoy :)