Name: S’mores Cookie Bars Recipe
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: American
Ingredients: 1 cup unsalted butter, softened; 1 cup brown sugar, packed; 1/2 cup granulated sugar; 2 large eggs; 1 teaspoon vanilla extract; 2 1/2 cups all-purpose flour; 1 teaspoon baking soda; 1/2 teaspoon salt; 1 cup graham cracker crumbs; 1 cup chocolate chips; 1 cup mini marshmallows; Extra chocolate chips, to taste; Extra mini marshmallows, to taste

Jump to Recipe· 4.3 from 6 reviews

I absolutely love sharing this S’mores Cookie Bars Recipe because it’s such a delightful twist on the classic campfire treat. To me, it’s the perfect way to enjoy the nostalgic flavors of graham crackers, melted marshmallows, and chocolate chips all baked into a perfectly chewy, buttery cookie bar. Every bite brings a warm, gooey, and crunchy combination that’s impossible to resist, and I find myself making these bars whenever I want an easy yet impressive dessert to share.

Why You’ll Love This S’mores Cookie Bars Recipe

What really makes this S’mores Cookie Bars Recipe stand out for me is how wonderfully the flavors blend together. The sweetness of the marshmallows and chocolate chips pairs beautifully with the slightly salty buttery cookie base, and the graham cracker crumbs add a subtle crunch and that authentic s’mores taste I crave. It’s like camping in a pan, but way more convenient and less smoky!

Besides the incredible flavor, I appreciate how straightforward this recipe is to prepare. Even if you’re new to baking, the steps are simple and quick, and you don’t need fancy equipment or rare ingredients. I often make these bars for family gatherings, potlucks, or a fun weeknight treat, and they always vanish fast. Whether you’re feeding a crowd or just want a sweet bite, these bars deliver big time with minimal fuss.

Ingredients You’ll Need

The image shows various baking ingredients arranged neatly on a white marbled surface. At the top left, a small white bowl holds white powdered sugar, next to a white square dish filled with granulated white sugar. Below them, a red round bowl contains white salt. To the left center, a clear glass bowl is filled with white flour. Near the center, a small white dish holds light brown vanilla extract, next to a white square plate with two eggs, one white and one brown, and a mound of light brown sugar. Below that, two sticks of pale yellow butter lie side by side. At the bottom left, a clear bowl is full of light brown graham cracker crumbs. Next to it, a large white jar labeled Jet-Puffed marshmallow creme stands upright. To the right, a clear bowl is filled with semi-sweet dark chocolate chips, and next to it several wrapped Hershey's milk chocolate bars are partially stacked. All the ingredients are clearly labeled with bold black text on white backgrounds. Photo taken with an iphone --ar 4:5 --v 7

This recipe calls for easy-to-find ingredients, each playing an important role to create those iconic s’mores flavors while keeping the texture soft and tender. From the rich butter and sugars to the crunchy graham crumbs and melty marshmallows, every component enhances the final product beautifully.

Unsalted butter: Softened for easy creaming, it gives the base that rich, tender crumb I love in cookie bars.
Brown sugar: Packed for moisture and a deep caramel flavor that balances the sweetness.

Granulated sugar: Adds a bit of crispness and sweetness to the cookie dough.
Large eggs: Help bind everything together and add richness.
Vanilla extract: Adds a warm, comforting flavor that ties all the ingredients together.
All-purpose flour: The sturdy base of the cookie dough providing structure.

Baking soda: Helps the bars rise slightly for a soft, tender bite.
Salt: Enhances all the flavors, balancing the sweetness perfectly.
Graham cracker crumbs: Adds authentic s’mores flavor and a lovely texture contrast.
Chocolate chips: Melty, gooey bursts of chocolate in every bite.

Mini marshmallows: Create that signature s’mores gooeyness right inside the bars and on top for extra indulgence.

Directions

Step 1: Preheat your oven to 350°F (175°C) and prepare a 9×13 inch baking pan by greasing it or lining it with parchment paper. This makes removal easy and cleanup simpler after baking.

Step 2: In a large mixing bowl, cream together the softened butter, brown sugar, and granulated sugar until the mixture becomes light and fluffy. This step is key to a tender cookie texture.

Step 3: Beat in the eggs one at a time, mixing well after each addition. Then stir in the vanilla extract, which adds a lovely aromatic touch.

Step 4: In a separate bowl, whisk the all-purpose flour, baking soda, and salt. This ensures even distribution of the leavening agents and seasoning.

Step 5: Gradually add the dry ingredients to the wet butter mixture, stirring gently until just combined. Be careful not to overmix, as that can make the bars tough instead of soft.

Step 6: Fold in the graham cracker crumbs and chocolate chips evenly, so every bite has that classic s’mores texture and bursts of chocolate.

Step 7: Spread half of the cookie dough evenly into the prepared pan, pressing it down gently to form a solid layer.

Step 8: Sprinkle the mini marshmallows evenly over the cookie dough layer. This helps them melt into gooey pockets within the bars.

Step 9: Carefully spoon the remaining cookie dough over the marshmallows, spreading it out gently to fully cover the marshmallow layer without removing it.

Step 10: Top the bars with extra chocolate chips and mini marshmallows. This creates a beautiful, melty topping that’s irresistible.

Step 11: Bake for 25-30 minutes or until the top is golden brown and a toothpick inserted in the center comes out clean. Keep an eye on the marshmallows you sprinkled on top to make sure they get golden but not burnt.

Step 12: Let the bars cool in the pan for about 10 minutes. If you used parchment paper, use it to lift the entire batch out onto a wire rack to cool completely before slicing into squares.

Step 13: Serve and enjoy your delicious S’mores Cookie Bars with family and friends! The gooey marshmallow and chocolate—combined with a buttery cookie—make every bite a true treat.

Servings and Timing

This S’mores Cookie Bars Recipe yields about 12 generous servings, making it perfect for sharing at gatherings or satisfying a family’s sweet tooth. The prep time is quite manageable at around 15 minutes, with a baking time of 25-30 minutes. Including cooling, you’ll have these delightful bars ready in approximately 45 minutes from start to finish, which I always appreciate when I’m in the mood for a quick homemade dessert.

How to Serve This S’mores Cookie Bars Recipe

The image shows nine square dessert bars arranged closely together on a white marbled surface. Each bar has three visible layers: a golden-brown crispy cookie-like crust at the bottom, a middle layer filled with melted light brown and dark chocolate pieces, and a top layer dotted with small white marshmallows that are slightly melted and soft in texture. The edges of the bars are slightly darker, giving a baked look. The bars have a rich and chewy appearance with the marshmallows adding a soft contrast on top. Photo taken with an iphone --ar 4:5 --v 7

I like to serve these cookie bars slightly warm to enjoy the melty chocolate and marshmallow goo at their best. Right out of the oven, I often cut them into squares and place them on a platter for guests to grab while still soft and sticky. For a lovely presentation, sprinkling a few extra mini marshmallows or chocolate shavings on top right before serving adds a nice finishing touch.

To really elevate the experience, I love pairing these bars with a cold glass of milk or even a frothy hot chocolate. If you’re serving adults, a robust coffee or a sweet dessert wine like a late-harvest Riesling complements the bars’ richness beautifully. These bars also shine at casual family dinners, holiday parties, or even summer barbecue dessert tables since they bring that beloved campfire nostalgia indoors.

If you prefer, you can chill these bars slightly and serve them at room temperature, which firms them up and makes them easier to handle for packing into lunchboxes or gifting. No matter how you serve them, I find these S’mores Cookie Bars always get eager requests for seconds and make the perfect ending to any meal.

Variations

One of the best parts about this S’mores Cookie Bars Recipe is how adaptable it is to your tastes and dietary needs. For instance, you can swap the all-purpose flour with a gluten-free blend to make it friendly for gluten-sensitive friends, and I’ve found oat flour works nicely too for a little extra chewiness. Using vegan butter and egg replacer can turn this into a vegan-friendly treat without losing any of the classic flavors.

If you want to change up the flavors, try adding chopped nuts like toasted pecans or walnuts to the dough for crunch and richness. You could also experiment by mixing in peanut butter chips or white chocolate chips with the chocolate for a twist. For a cooked marshmallow flavor, placing the bars under the broiler for 1-2 minutes after baking gives the marshmallows that delicious toasted finish.

Lastly, for a different cooking method, you might try making these as individual cookie bar cups using a muffin tin – adjust baking time to about 15-20 minutes – perfect for individual grab-and-go snacks or mini party treats.

Storage and Reheating

Storing Leftovers

After you’ve enjoyed your bars, any leftovers can be stored in an airtight container at room temperature for up to 3 days without losing their chewy, gooey texture. I recommend placing parchment or wax paper between layers if stacking them to prevent sticking. If your kitchen is warm, storing them in the refrigerator is fine but bring them back to room temperature before serving for the best texture.

Freezing

This recipe freezes wonderfully! To freeze, cut the bars into squares and place them in a freezer-safe container or zip-top bag with parchment paper layers. They’ll keep well frozen for up to 2 months. When you’re ready to enjoy, simply thaw them overnight in the fridge or at room temperature for a few hours. If you want to revive some gooeyness, a quick zap in the microwave for 10-15 seconds works like magic.

Reheating

If you want to warm up your bars, I suggest heating them in the microwave or a low-temperature oven. Microwave a single bar for 10-15 seconds to bring back that freshly-baked marshmallow warmth or warm several bars in a 300°F (150°C) oven for 5-7 minutes. Avoid overheating, as that can dry them out or burn the marshmallows. Reheating gently keeps the texture soft and gooey, just like fresh from the oven.

FAQs

Can I use regular crackers instead of graham cracker crumbs?

While you can substitute other crackers, graham cracker crumbs have a unique slightly sweet, honeyed flavor essential to getting that true s’mores taste. Using regular crackers might alter the flavor and texture, so I recommend sticking to graham cracker crumbs for the best results.

Can I make these bars ahead of time?

Absolutely! These bars keep well for several days at room temperature, making them great for prepping in advance. You can bake them the day before your event and either serve them at room temperature or warm briefly before serving.

What if I don’t have mini marshmallows? Will regular marshmallows work?

Regular marshmallows can work, but I suggest chopping them into smaller pieces so they melt more evenly throughout the bars. Mini marshmallows are preferred because they distribute easily and provide gooey pockets without overwhelming the texture.

Is there a way to make these bars less sweet?

If you prefer a less sweet dessert, you can reduce the amount of granulated sugar slightly or use bittersweet chocolate chips instead of milk chocolate. Adding a pinch more salt to the dough can also balance the sweetness nicely.

How do I know when the bars are fully baked?

The bars are ready when the top is golden brown and a toothpick inserted in the center comes out clean or with just a few moist crumbs. The marshmallows on top should be nicely melted and browned, but make sure not to overbake to keep them soft and chewy inside.

Conclusion

I’m so excited for you to try this S’mores Cookie Bars Recipe because it truly captures the cozy, nostalgic flavors of s’mores in an easy-to-make dessert that everyone will love. Whether you’re enjoying them warm from the oven or sharing them at a get-together, these bars never fail to bring smiles and happy “mmmm” sounds around the table. Give them a try—I promise they’ll become one of your new favorite treats just like they are in my house!