Preheat your oven to 350°F (175°C).
In a large bowl, cream together the softened butter, brown sugar, and granulated sugar until smooth.
Beat in the eggs, one at a time, then stir in the vanilla extract.
In another bowl, combine the flour, baking soda, and salt.
Gradually blend the dry ingredients into the wet mixture.
Fold in the chocolate chips, mini marshmallows, and crushed graham crackers.
Scoop tablespoon-sized portions of dough onto a baking sheet lined with parchment paper.
Bake for 10-12 minutes or until golden brown around the edges.
Let the cookies cool on the baking sheet for 5 minutes before transferring them to a wire rack.