Preheat your oven to 375°F (190°C).
In a large mixing bowl, cream together the butter, brown sugar, and granulated sugar until light and fluffy.
Add the eggs and vanilla extract, and mix well.
In a separate bowl, whisk together the flour, baking soda, and salt. Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Fold in the chocolate chips, mini marshmallows, and graham cracker crumbs.
Drop rounded tablespoons of dough onto a baking sheet lined with parchment paper.
Bake for 8-10 minutes, or until the edges are golden brown.
Allow the cookies to cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.