These s'mores were a hit at my son's woodland themed birthday party. I made them the day before the party and kept them in the fridge. Although they would have been better hot out of the oven there was less mess this way. As another option you could put them on a stick as a S'more pop. Here are more details on this DIY S'mores Woodland Party Food Tutorial:
Here are the things you'll need.
Lay out your graham crackers on a baking sheet. Pre-heat your oven to 350 degrees.
Place one mashmallow on each graham cracker and put into oven for approx 3-5 minutes
Pull them out and immediately place another graham cracker on top.
Heat up some chocolate on a double broiler and dip the graham crackers sandwiches.
Lay them out to cool and sprinkle some graham cracker dust on them for decoration.
That's it. I put them on this great wooden board. They were gone in seconds.