While on vacation last week, my wife and some friends of ours solved the age-old problem of melting the chocolate and the marshmallow in a s'more. You stuff a chunk of chocolate (we prefer good old-fashioned Hershey's waxy American milk chocolate) inside the mallow and then toast the entire unit.
Do you see where this is going? No? How 'bout this?
Amen sisters and brothers. Now that's a properly-melted s'more.