4ouncesdark chocolate (70 percent), cut into chunks, or 3/4 cup of dark chocolate chips
1cuppacked mini marshmallows
36square-sized store-bought graham crackers
7 1/2ouncesmilk chocolate squares, halved
Line two baking sheets with parchment paper.
Whisk together the flour, cinnamon, salt and baking soda in a medium bowl; set aside. Cream the butter, brown sugar and granulated sugar in a stand mixer on medium-high speed until pale and fluffy, about 3 minutes. Add the eggs, one at a time, mixing on medium speed for 15 seconds after each addition. Add the vanilla and mix until smooth. Add the dry ingredients and mix until combined. Fold in the dark chocolate and the marshmallows.
Using a medium cookie scoop (about 1 1/2 tablespoons), scoop the dough into balls and place them close together on one of the prepared baking sheets. Freeze for at least 1 hour.
Preheat the oven to 400 degrees F.
Place the graham crackers side by side on the second prepared baking sheet. Place 1 ball of the frozen cookie dough on each graham cracker. Bake until the cookies are puffed and just turning golden, 10 to 12 minutes. Remove the baking sheet from the oven and immediately press 1 piece of milk chocolate onto each hot cookie--be sure to really press the chocolate into the soft cookie so that when it melts, it puddles on the cookie and doesn't run off.