Chocolate fudge sauce Finely crush 22 cookies. Mix 1-1/4 cup crumbs and margarine; set aside remaining crumbs. Press onto bottom of 9" pie plate. Stand 14 cookies around edge of plate, pressing lightly into crust. Scoop chocolate ice cream into balls; arrange in prepared crust. Coarsely chop remaining 6 cookies; sprinkle over ice cream scoops. Spread softened vanilla ice cream evenly over cookie layer; freeze 15 minutes. Top with a layer of reserved cookie crumbs, pressing gently into ice cream. Freeze several hours or overnight. To serve, garnish with whipped topping and chocolate sauce.