A S’more is a cracker sandwich made from milk chocolate, graham crackers, and toasted marshmallows. The earliest mention of such a treat, specifically a recipe for Campfire Graham Cracker Sandwich, is listed in A Book of 150 Recipes Prepared with Campfire, the Original Food Marshmallows from the 1920s. The recipe writer says that they are “especially for Boy Scouts and Girl Scouts” and that they are “to be made around an open fire.” I beg to differ on both points. Anyone can enjoy them. And you can even make S’mores indoors.