Preheat the oven to 375 degrees Fahrenheit and line a baking sheet with parchment paper.
Break the graham crackers in half so you have two squares, then lay out on the baking sheet. Top each graham cracker with a square of chocolate, then with half of a marshmallow.
Top with a flattened scoopful of chocolate chip cookie dough, forming it downward over the marshmallow slightly.
Transfer to the oven and bake for 10-14 minutes or until the edges of the dough have browned and the top is beginning to crack.
Remove and let cool for 3-5 minutes then enjoy! Top with flaky sea salt if desired.