½cup(113g)salted butter, softened to room temperature
¼cup(53g)granulated sugar
¼cup(53g)light brown sugar
1large egg
1teaspoonvanilla extract
1 ¼cups(178g)all-purpose flour
8rectangular graham crackers, crushed into fine crumbs (about 1 cup/100 g)
½teaspoonbaking powder
¼teaspoonbaking soda
¼teaspoonsalt
12large marshmallows cut in half (see note)
24Hershey's Kisses, unwrapped (see note)
Instructions
Preheat the oven to 350 degrees F. Line two large, rimmed baking sheets with parchment paper. Set aside.
Using an electric handheld mixer or in the bowl of a stand mixer fitted with the paddle attachment, beat together the butter, granulated sugar, and brown sugar until well-mixed and creamy, 1 to 2 minutes.
Add the egg and vanilla and mix until thoroughly combined.
Add the flour, 3/4 cup (85 g) of the graham cracker crumbs (reserve the remaining crumbs for later), baking powder, baking soda and salt. Mix until combined and no dry streaks remain.
Scoop the cookie dough into heaping tablespoon-sized portions and roll into balls. (I use a small #60 cookie dough scoop.)
Roll each cookie dough ball in the remaining graham cracker crumbs to coat lightly.
Place the cookies several inches apart on the prepared baking sheets and bake for 8 to 9 minutes. They should still be soft (they'll go into the oven again in the next step). Don't over bake.
Preheat the broiler and make sure the oven rack is 8 to 10-inches below the heating element (too close and the marshmallows will burn).
Place a marshmallow half, cut side down, on the top of each cookie. Return to the oven and broil until the marshmallows are just turning golden, 30 to 45 seconds. Watch closely so the marshmallows don't burn!
Immediately out of the oven, work quickly and press a Hershey's Kiss gently into the center of each marshmallow.
Serve immediately for a warm, gooey s'mores cookie, or serve at room temperature after the cookies have cooled (they are delicious either way!).
Notes
Marshmallows: cut the marshmallows in half crosswise (i.e. like a hamburger bun). Using lightly greased kitchen scissors works great for this task. Hershey's Kisses: any variety of Hershey's Kisses will work here. Unwrap the kisses before making the cookies so they are ready to go. I like to store the unwrapped kisses in the freezer until they are pressed into the marshmallows. This helps them retain their shape after coming in contact with the hot marshmallow/cookie.Baking Method for Two Pans at Once:if you are working with a single oven and don't want to switch back and forth between the bake and broil function, here are a few options:-If your oven has convection function, you can bake both pans of cookies at once with the following modifications: reduce oven temperature to 325 degrees F, space the oven racks several inches apart, and keep an eye on baking time (the cookies might bake a bit faster). -If using standard bake function, bake both pans of cookies (one at a time) before broiling the marshmallows. Once both pans of cookies have baked, preheat the broiler, top the cookies with marshmallows and proceed to broil the marshmallows one baking pan at a time (press the kisses into the golden marshmallows immediately out of the oven).