If you don't have a pre-made Oreo pie crust, or simply want to make a homemade Oreo crust, it's really quite simple! Just two ingredients are needed to make the crust - Oreos and melted butter. First, you'll crush the cookies using a food processor or a rolling pin until they're in fine crumbs. Then, you'll mix Oreo crumbs and the melted butter and press it into the bottom and up the sides of a pie plate. This is the recipe I follow.