Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper.

In a large bowl, cream together the softened butter, granulated sugar, brown sugar, and vanilla extract until smooth.

Add the eggs one at a time, mixing well after each addition.

In a separate bowl, whisk together the flour, baking soda, and salt. Gradually add the dry ingredients to the wet mixture, mixing until just combined.

Fold in the chocolate chips, mini marshmallows, and graham cracker crumbs until evenly distributed.

Drop rounded tablespoons of dough onto the prepared baking sheet, leaving space between each cookie.

Bake for 10-12 minutes, or until the edges are golden brown.

Remove from the oven and let cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.