Pre-heat the oven to 350°.
Spray your pan with cooking spray.
Remove the cream from all of your Oreo Cookies.
Place each de-creamed cookie in a gallon-sized Ziploc bag.
Seal the bag, making sure to get all the air out, and crush the cookies with a rolling pin (or you can crush them up in a blender/food processor).
Melt the butter.
Add the crushed Oreos and the melted butter to a large mixing bowl, and stir together well.
Press the cookie mixture into your pan, covering the bottom and up the sides of the pan.
Bake at 350° for about 10 minutes.
Allow the crust to cool, and fill with whatever type of cake, pie, or dessert you are making, following the instructions for that specific dessert.