S'mores made their debut in a Cookbook in the 1920s, and they weren't always called smores. They were called a graham cracker sandwich. However, it was prepared the same way as we know smores today to be. That 1920 recipe stated the Boys and girl scouts were already using this recipe regularly. About seven years later, the Girl Scouts renamed the recipe in a publication calling it "Some more," the same recipe different name. Ten years later, another cookbook blended the "some more" to "S'mores" as we know it today. Because everyone wants "some more" smores once they eat it. (reference)