Best S'mores Cookie Bars (Recipe & Photos) (2024)

Preheat oven to 350 degrees and spray a 9x13 baking dish with non-stick cooking spray.

In the bowl of a stand mixer or a large bowl with an electric hand mixer, cream together the butter, brown sugar, and granulated sugar. Beat on medium speed about one minute until well mixed.

Add eggs and vanilla and mix well. Use a rubber spatula to scrape down the sides of the bowl.

In a separate bowl, stir together the graham cracker crumbs, baking powder, and salt.

With the mixer on low, slowly add the dry ingredients to the butter and sugar mixture. Mix until just combined.

Turn out dough onto a clean countertop or board. Divide the dough in half.

Press one half of the dough into the bottom of the prepared baking dish. I spray my fingers with cooking spray to keep the dough from sticking to my hands.

Next, lay out the Hershey’s bars to cover the dough. 3 XL fit perfectly. If you are using the regular size, break them up to cover the dough.

Spread the 3 cups of marshmallow creme over the chocolate bars and spread Otto the edges of the pan.

With the remaining half of the dough, use your hands to flatten sections of the dough and lay it out to cover the top of the marshmallow creme. You can also roll out the dough on a floured surface and then transfer it to cover the marshmallow creme.

Place in preheated oven. And bake 30-35 minutes until top is golden brown. Don’t bake longer than 35 minutes.

Remove from oven and let cool at room temperature for several hours. Do not cut into these bars until the bottom of the pan is completely cool. I make these at night and then cut int0 them the next day.