Put a graham cracker half on a microwave safe plate.
Place the chocolate bar on the graham cracker and put a marshmallow on top.
Put the plate in the microwave and set the cook time to 20 seconds intervals or until the marshmallows puff up and the chocolate melts.
Take the plate out of the microwave and place the other graham cracker square on top to make a sandwich.
Enjoy your delicious smores!