In a bowl, combine 3-3/4 cups cookie crumbs and butter. Press into a greased 13-in. x 9-in. x 2-in. dish. Spread with ice cream; cover and freeze until set.
Drizzle fudge topping over ice cream; cover and freeze until set. Spread with whipped topping; sprinkle with remaining cookie crumbs. Cover and freeze for 2 hours or until firm. Remove from the freezer 10 minutes before serving. Yield: 12 servings.