Preheat your oven to 350°F and line a baking sheet with parchment paper.
In a large bowl, cream together the softened butter, brown sugar, and granulated sugar until the mixture is pale and fluffy.
Beat in the egg and vanilla extract until fully incorporated.
In a separate container, whisk together the flour, baking soda, and salt.
Gradually combine the dry ingredients with the wet ingredients until a soft dough forms.
Fold in half of the crushed graham crackers into the dough.
Take a portion of dough, flatten it, place 3-4 frozen mini marshmallows and some chocolate chunks in the center, and fold the edges over to seal completely.
Roll the stuffed dough into a ball and roll in the remaining graham cracker crumbs.
Arrange on the prepared baking sheet and bake for 12 minutes until the edges are golden.