First, you have to brown the marshmallows without catching them on fire.
Finally, let little brother eat the first one since he had burned his foot on a hot coal that had fallen on the floor and was unable to make his own.
After an exhaustive google search for cherry s'mores, I think she may have actually invented a new recipe! I found recipes for s'mores made with marshmallow creme, dried cherries, maraschino cherries, baked into cookies, melted in the microwave - but none with fresh cherries added on to traditional s'mores roasted over an outdoor fire.
The sweetness of the cherries combined with the strength of the dark chocolate made for a delicious combination.