Preheat the oven to 375° F
Beat butter and sugars in a mixer.
Add egg and vanilla, scraping sides.
Add flour, baking soda and salt. Add chocolate chips. Dip each of the square graham cracker into the melted butter and lay on a parchment lined cookie sheet.
Scoop 3 ounces of dough out and stuff 5 mini marshmallows in the center enclosing them tightly. Lay ball on top of graham and flatten just slightly.*Optional: For a big wow factor with more chocolate top the graham with a square of Hershey's chocolate before laying the dough on top! Bake at 375° F for 11-15 minutes or until the cookies have spread and have turned golden brown. Keep an eye on them the first time as everyone's oven is different! Use a large cookie cutter to help round the cookie when out of the oven.
Cool a few mins and top with a chocolate piece. Top with graham cracker crumbs, if desired.
