S'more appears to be a contraction of the phrase "some more". The first recorded version of the recipe can be found in the publication Tramping and Trailing with the Girl Scouts of 1927. Although the exact origin is unclear, reports on the group from as early as 1925 describe them. Merriam-Webster marks 1974 as the first use of S'more, though recipes for "Some Mores" are in various Girl Scout publications until at least 1973. However, a 1956 recipe uses the exact name (S'Mores), and lists the ingredients as "a sandwich of two graham crackers, toasted marshmallow and 1/2 Hershey Bar". In 1968 Clarice Nelms provided the following recipe: Place a square of milk chocolate on a graham cracker. Toast a marshmallow and put on top of the chocolate, then a second graham cracker on top of the toasted marshmallow and squeeze and you will want "s'more". Still earlier references exist, such as the camp recipes section in the 1963 "Outing Activities and Winter Sports Guide" stating "By now, readers who watch their weight are probably rising in protest since none of these recipes could conceivably be called low calorie. But after all, camping trips are supposed to be fun. Why not relax, enjoy yourself, and have s'more?" and the 1958 publication "Intramural and recreational sports for high school and college" makes reference to Marshmallow toasts and S'more hikes as does its related predecessor, the "Intramural and Recreational Sports for Men and Women" published in 1949.
Hershey's S'mores inside
Various confections containing graham cracker, chocolate, and marshmallow are often sold as some derivative of a s'more, but they are not necessarily heated or served in the same shape as the traditional s'more. The Hershey's S'mores bar is one example. Pop-Tarts also feature a s'mores variety.
^American Association for Health, Physical Education, and Recreation. Division for Girls and Women's Sports, 'Outing Activities and Winter Sports Guide', page 43, Sports library for girls and women, Division for Girls and Women's Sports, American Association for Health, 1963
^Norma Leavitt, Hartley D. Price, 'Intramural and recreational sports for high school and college', page 151, Ronald Press Co., 1958
^Norma Leavitt, Hartley D. Price, "Intramural and Recreational Sports for Men and Women", p 150, A. S. Barnes, 1949