Place 4 (8-ounce) parfait glasses in freezer, and freeze 10 minutes. Spoon 1 tablespoon cookie crumbs into each glass; top with 1/4 cup ice cream, 1 tablespoon fudge sauce, 1 tablespoon cookie crumbs, and 1/4 cup ice cream. Freeze 2 hours or until firm. Top each parfait with 1 tablespoon whipped topping. Garnish with coffee beans, if desired. Serve immediately.