This Chips Ahoy Icebox Cake can be made with Chips Ahoy Cinnamon Thins or regular Chips Ahoy. I used the Thins, so if you use thicker cookies you may need fewer.
If you want to cut neat squares, line the pan with plastic wrap, leaving a large overhang on each side. Assemble and chill as directed. After the cookies have softened (about 4 hours), bring the plastic wrap up and over the cake and freeze until firm. Lift from pan and cut into squares.