It just wouldn’t be right to celebrate National S’mores Day without making a couple of s’mores – or at least using the concept of the s’more as a jumping off point for something equally delicious. This bar cookie is a variation on the classic s’more. Instead of sandwiching marshmallow and chocolate in between two graham crackers, or even between two cookies, the fillings are baked right along with the cookie dough. The result is a bar with the gooey, sweet filling that we all know and love and a buttery, chewy, graham-flavored cookie surrounding it. It’s obviously a s’more, but I’m willing to bet that you haven’t had a s’more that tastes quite like this before.
The dough is a fairly standard cookie dough, but graham cracker crumbs are added in to give it a graham cracker flavor. It’s a crucial component of the classic s’more and it’s a nice touch in this recipe. Once mixed up, it is divided in half and pressed into the pan to form a crust. The bottom crust is layered with chocolate and marshmallow, then topped with the remaining dough. It’s close to impossible to spread the dough over the marshmallow and I achieved an even upper crust by flattening small pieces of dough and placing them, like a puzzle, gently on top of the marshmallow.
Speaking of the marshmallow, the puffed kind doesn’t hold up inside this bar cookie. You really need to use marshmallow creme or marshmallow fluff, which can be easily spread on top of the chocolate and can withstand the heat of the oven during baking. I stuck with Hershey’s as the chocolate, since that was always the standard s’more chocolate when I was little. Plus, the king sized Hershey’s bars are the perfect size to fit into the baking pan for an even layer of chocolate.
The bars can be eaten slightly warm (and gooey) or at room temperature, though I would lean towards room temperature for ease of slicing and being able to eat without making a huge mess. They taste and smell amazing and are crazily addictive, so be forewarned that you might be tempted to eat a second one before you are done with the first.
S’More Cookie Bars
1/2 cup butter, room temperature
1/4 cup brown sugar
1/2 cup sugar
1 large egg
1 tsp vanilla extract
1 1/3 cups all purpose flour
3/4 cup graham cracker crumbs*
1 tsp baking powder
1/4 tsp salt
2 king-sized milk chocolate bars (e.g. Hershey’s)
1 1/2 cups marshmallow creme/fluff (not melted marshmallows)
Preheat oven to 350°F. Grease an 8-inch square baking pan.
In a large bowl, cream together butter and sugar until light. Beat in egg and vanilla.
In a small bowl, whisk together flour, graham cracker crumbs, baking powder and salt. Add to butter mixture and mix at a low speed until combined. Divide dough in half and press half of dough into an even layer on the bottom of the prepared pan.
Place chocolate bars over dough. 2 king-sized Hershey’s bars should fit perfectly side by side, but break the chocolate (if necessary) to get it to fit in a single layer no more than 1/4 inch thick.
Spread chocolate with marshmallow creme or fluff.
Place remaining dough in a single layer on top of the fluff (most easily achieved by flattening the dough into small shingles and laying them together).
Bake for 30 to 35 minutes, until lightly browned.
Cool completely before cutting into bars
Makes 16 cookie bars.
*Note: 3/4 cup crumbs is approx 7 full-sized graham cracker sheets, whizzed in the food processor until fine.