S’more is a contraction of the phrase “some more”. S’more appeared in a cookbook in the early 1920s, where it was called a “Graham Cracker Sandwich”. The contracted term “cracker sandwiches’mores” appears in conjunction with the recipe in a 1938 publication aimed at summer camps.

Smores Recipe – How To Make Smores”. How To Make Melt-In-Your-Mouth S’mores Over A Campfire”. The Perfect S’more Is Practically Burned and a Little Salty”. Copycat Restaurant Recipes – Over 869 recipes and counting!