Process crushed cookies or crackers, sugar, and (if used) salt in a food processor until finely crushed and well combined. Add melted butter, and process until thoroughly combined. Press on bottom, up sides, and onto lip of a lightly greased (with cooking spray) 9-inch regular pie plate or 9-inch deep-dish pie plate. Freeze 30 minutes to 1 hour or while preparing fillings.

Note: For baked piecrusts, preheat oven to 325°. Bake crust 8 to 10 minutes or until lightly browned.