pkg. (1lb. 2oz.) Oreo Chocolate Sandwich Cookies, divided
cup (1/2stick) butter, melted
pkg. (8oz. each) Cream cheese, softened
tub(8oz.) Cool Whip, thawed
Line 13x9 inch pan with foil, with the ends of the foil extending over sides of pan. Coarsely chop 15 of the cookies; set aside. Finely crush remaining cookies; mix with butter. Press firmly onto bottom of prepared pan. Refrigerate while preparing filling Beat cream cheese, sugar and vanilla in a large bowl, with electric mixer on medium speed until well blended. Gently stir in whipped topping and chopped cookies. Spooon over crust; cover Refrigerate 4 hours or until firm.