In an 11"x13" pan put ... spread the crushed cookies on bottom of pan, save 1/2 cup; layer ice cream evenly onto the cookies; ... 5 minutes before serving.
Crush cookies. Place cookies in bottom ... pat down. Freeze for 1/2 hour. Combine Hershey's syrup ... 1/2 hour. Spread ice cream over mixture. Freeze for ... 24 hours before serving.