What a fun summer treat. Reminds me of when I went camping with Girl Scouts. I make mine for my kids indoors. Not too big a fan of starting a fire in the backyard :)
Preheat oven to 325. Line a pan w/ foil to avoid having your house smell of burned marshmallows (ask me how I know!)
Place 1 half of a graham cracker on the pan and top w/ 3 rectangles of Hershey's chocolate. Place 1 jumbo marshmallow on the chocolate and bake in the oven for about 6 minutes. Take another half of cracker and gently smoosh the marshmallow down.
Enjoy the ooey, gooey, goodness!!