Are you looking for a chocolate pie crust or graham cracker crust? Either way, you would crush up (or as I do, blend in a blender) the graham crackers (and about 1 tsp. cinnamon) or oreo cookies(chocolate cookies minus the cream filling and I don't use cinnamon when I do chocolate), about 1/2 cup sugar, and stir in enough melted butter/margarine to hold the crumbs together when you press gently with your fingers, about 1/2 cup per 15 crushed graham crackers. I haven't ever really figured out how many chocolate cookies it takes to make one crust, though; I would estimate that you need about 2 cups of either to make a good pie crust. This needs to be placed in the freezer for a while to allow the crust to harden before adding your filling and then baked with the filling if instructed in the recipe that you are using. Hope this helps.