(You want the ice cream to be spreadable but not liquid.) In the bottom of the loaf pan, place 5 ice cream sandwiches in a single flat layer, chocolate “cookie” side down, trimming them to fit as needed. Cover the sandwiches with 1½ cups of ice cream (this will be about ¾ of a pint), smoothing it out to form an even layer about ¾- to 1-inch thick. Cover that with another layer of sandwiches, and then another layer of ice cream, spreading it so that it is even. Make sure the ice cream is smooth and packed tightly, then cover the entire loaf pan neatly with plastic wrap.