Preheat the oven to 325° and have ready two cookie sheets lined with parchment paper or silicone baking mats. Use a sharp pair of kitchen shears to cut the marshmallows in half and set aside.
After the 10 minutes is up, remove the cookies from the oven and close the oven door. Place the marshmallows sticky-side down in the center of each cookie, and apply gentle pressure, ensuring it is secure in the cookie. Return cookies to the oven and bake for an additional 6 minutes.
As soon as the cookies comes back out of the oven, place a Hershey square or Kiss in the center. Allow to cool slightly on the pan, about 5 minutes.
Makes 30-36 cookies.