Preheat oven to 375 degrees. Line 2 baking sheets with parchment paper.
In a large bowl, combine graham crumbs, flour, salt and baking soda. Stir together.
In the bowl of an electric mixer, combine sugars and coconut oil. Beat for 2-3 minutes on medium-high speed. Scrape down the bowl. Add the eggs and beat for an additional 60 seconds. Add the vanilla. Scrape down the bowl. Turn the mixer to the lowest setting. Slowly add the flour mixture stirring until combined. Add in the chocolate.
Scoop the batter into golf ball sized balls and place on prepared baking sheet spaced 2 inches apart. Flatten slightly with your hand. Bake in preheated oven for 7 minutes. Working quickly, remove from oven and top each cookie with a few marshmallows and put the cookies back in the oven for an additional 3 minutes.