Preheat Oven:

Set oven to 350°F (175°C).

Line baking sheets with parchment paper.

Cream Butter & Sugars:

In a large bowl, beat the butter, brown sugar, and granulated sugar until light and fluffy (about 2–3 minutes).

Add Egg & Vanilla:

Mix in the egg and vanilla until smooth.

Mix Dry Ingredients:

In a separate bowl, whisk together flour, graham cracker crumbs, baking soda, and salt.

Gradually add dry ingredients to the wet mixture and mix until combined.

Add the Good Stuff:

Fold in chocolate chips, mini marshmallows, and graham cracker pieces.

Scoop & Bake:

Scoop dough into heaping tablespoons and place 2 inches apart on baking sheets.

Press a few extra chocolate chunks or marshmallows on top for that signature s’mores look.

Bake for 8–10 minutes, or until the edges are golden and marshmallows are gooey.

Cool Slightly & Serve:

Let cool on the baking sheet for 5 minutes before transferring to a wire rack.

Enjoy warm for maximum gooeyness!