Preheat the oven to 350ºF. In a food processor, process vanilla sandwich cookies into fine crumbs and place the crumbs in a medium bowl. Repeat with the ginger snaps. Stir in the melted butter and salt.

Using the back of a spoon or measuring cup, press the cookie crumbs evenly across the bottom and around the sides of a 9-inch pie plate. Bake until set, 5-7 minutes. Cool completely before filling.