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

In a large mixing bowl, cream together softened unsalted butter, brown sugar, and granulated sugar until light and fluffy.

Mix in pumpkin puree, egg, and vanilla extract until well combined.

In a separate bowl, whisk together flour, baking soda, pumpkin pie spice, and salt. Gradually add to wet mixture until just combined.

Fold in chocolate chips, mini marshmallows, and crushed graham crackers.

Scoop rounded portions of dough onto the prepared baking sheet, spacing them about 2 inches apart.

Bake for 12-14 minutes until the edges are golden brown and the centers are soft.

Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.