The Best s’mores cookie bars Recipe
If you have a soft spot for nostalgic campfire treats, you are in for a real delight with The Best s’mores cookie bars. This recipe takes everything you love about classic s’mores—gooey marshmallow, melty chocolate, and crunchy graham crackers—and wraps it all into a rich, chewy cookie bar. Perfectly balanced between crispy edges and a soft center, these bars are an irresistible twist that feels both comforting and a bit inventive. Whether you’re serving them at a party or simply indulging solo, they are bound to satisfy those sweet cravings like no other treat can.

Ingredients You’ll Need
These ingredients are simple yet crucial for nailing the perfect texture and flavor in The Best s’mores cookie bars. Each element plays its part in layering taste and creating that irresistible balance of gooey, crunchy, and chewy.
- 1/2 cup Butter, softened: Provides richness and helps create a tender, chewy cookie texture.
- 1/3 cup Brown sugar: Adds moistness and a deep caramel flavor that complements the marshmallow and chocolate.
- 1/4 cup Granulated sugar: Balances sweetness and contributes to slight crispiness in the cookie edges.
- 1 Egg: Binds the ingredients together, giving structure to the cookie bars.
- 1 tsp Vanilla extract: Enhances all the flavors with its warm, sweet aroma.
- 1 1/2 cup All-purpose flour: The base for the cookie dough, ensuring just the right chewiness.
- 1/2 cup Graham crackers, finely crushed: Adds authentic s’mores crunch and a subtle honeyed note.
- 1/4 tsp Salt: Amplifies the sweetness and balances the overall flavor.
- 3/4 tsp Baking soda: Helps the cookies rise slightly for a tender crumb.
- 5 standard Hershey bars: The classic chocolate that melts deliciously over the cookie base.
- 1 1/2 cup Marshmallow fluff: Provides the signature gooey marshmallow layer that makes these bars dreamy.
How to Make The Best s’mores cookie bars
Step 1: Preheat and Prepare
Start by heating your oven to 350 degrees Fahrenheit and lining an 8×8 inch baking pan with parchment paper. This step is essential for easy removal of your bars later and ensures even baking. The parchment also helps keep the bars intact when transferring the dough layers.
Step 2: Cream the Butter and Sugars
Combine the softened butter with both brown and granulated sugars until smooth and creamy. This process is important because it incorporates air, giving your cookie dough a light texture while blending the flavors beautifully.
Step 3: Add Egg and Vanilla
Beat in the egg and vanilla extract thoroughly. These ingredients bring moisture and flavor depth to the cookie dough, enhancing the chewy yet tender final result.
Step 4: Mix Dry Ingredients
In a separate bowl, whisk together all-purpose flour, finely crushed graham crackers, salt, and baking soda. Then gently fold this into your butter-sugar mixture just until the flour disappears. Overmixing here can make the cookies tough, so be gentle.
Step 5: Form the Base Layer
Press half of the cookie dough evenly into your prepared pan. Then, carefully remove the parchment paper with the dough attached and place it in the freezer. This chilling step helps the dough firm up so it doesn’t crumble when you flip it later—key to achieving those perfect layers in The Best s’mores cookie bars.
Step 6: Add the Chocolate and Marshmallow
Reline the pan with fresh parchment. Place broken pieces of the Hershey bars evenly over the bottom dough layer. Spread the marshmallow fluff gently over the chocolate, creating that classic gooey layer we all crave. Then, carefully flip your frozen dough layer on top, pressing lightly to keep it intact.
Step 7: Bake and Cool
Bake your cookie bars in the preheated oven for 25 minutes. Once out of the oven, patience is key—let the bars cool completely before slicing. This allows the layers to set beautifully, giving you that stunning cross-section and perfect bite that make The Best s’mores cookie bars so unforgettable.
How to Serve The Best s’mores cookie bars

Garnishes
To make these bars even more festive, sprinkle a bit of crushed graham cracker or mini marshmallows on top before serving. A light dusting of powdered sugar is also a sweet touch that makes them look irresistible. These little accents add a fun texture contrast and elevate the s’mores experience.
Side Dishes
Pair these cookie bars with a simple scoop of vanilla ice cream or a cold glass of milk for a classic indulgence. Hot chocolate or a rich coffee also complement the chocolate and marshmallow flavors wonderfully, making your dessert moment feel extra cozy and decadent.
Creative Ways to Present
For a party, consider serving The Best s’mores cookie bars in mini squares on a rustic wooden board alongside skewers of toasted marshmallows or small bowls of chocolate chunks. Wrapping individual bars in parchment and tied with twine also makes for a charming gift or handout. Presentation is a fun way to amp up the delight and make every bite feel special.
Make Ahead and Storage
Storing Leftovers
Store any leftover s’mores cookie bars in an airtight container at room temperature for up to 3 days. Keeping them sealed preserves their chewy texture and gooey marshmallow without drying out, so they stay just as delicious as the day you baked them.
Freezing
You can freeze these bars for longer storage—wrap them tightly in plastic wrap and foil, then place them in a freezer-safe container for up to 2 months. Thaw overnight in the fridge before serving, allowing the layers to regain their perfect texture and gooeyness.
Reheating
If you want to enjoy these bars warm, pop them in the microwave for 15-20 seconds or in a preheated oven at 300 degrees Fahrenheit for about 5 minutes. Just be careful not to overheat, or the marshmallow layer might melt excessively, but a little melty warmth only adds to the charm!
FAQs
Can I use milk chocolate instead of Hershey bars?
Absolutely! Milk chocolate bars work wonderfully and offer a creamier texture, while dark or semi-sweet chocolate adds a richer depth of flavor. Feel free to use your favorite chocolate for a personalized twist.
Is it necessary to freeze the cookie dough before assembling?
Freezing the bottom cookie layer helps it firm up, which makes flipping the dough over the marshmallow and chocolate layer much easier. Skipping this step could lead to cracks or uneven layers, so it’s recommended for the best results.
Can I substitute marshmallow fluff with regular marshmallows?
You can! However, marshmallow fluff spreads more evenly, creating that luscious, smooth gooey layer. If using regular marshmallows, chop them finely and layer quickly before baking to ensure even melting.
How do I know when the cookie bars are done baking?
You want the edges to be slightly golden and the tops firm to the touch, but the center should still feel a bit soft. Since these bars are rich and chewy, a little softness in the center means they’re perfectly baked.
Can I double this recipe for a larger pan?
Yes, doubling the ingredients to fit a 9×13 inch pan works well. Just keep an eye on baking time—it may need a bit longer, around 30-35 minutes. Check frequently to avoid overbaking.
Final Thoughts
Once you try The Best s’mores cookie bars, you’ll wonder how you ever enjoyed s’mores any other way. This recipe brings the joy of campfire treats indoors in a way that’s both nostalgic and new. Easy to make yet impressively delicious, these bars are made for sharing and savoring. So grab your ingredients, roll up your sleeves, and prepare to fall in love with a truly irresistible dessert.
PrintThe Best s’mores cookie bars Recipe
These s’mores cookie bars combine the classic campfire treat into a deliciously chewy and gooey dessert. Layers of rich cookie dough, melted Hershey chocolate bars, and fluffy marshmallow fluff create a perfect harmony of textures and flavors, making these bars a delightful treat for any occasion.
- Prep Time: 20 minutes
- Cook Time: 25 minutes
- Total Time: 45 minutes
- Yield: 16 bars 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
- Diet: Vegetarian
Ingredients
Cookie Dough
- 1/2 cup Butter, softened (salted or unsalted)
- 1/3 cup Brown sugar
- 1/4 cup Granulated sugar
- 1 Egg
- 1 tsp Vanilla extract
- 1 1/2 cup All-purpose flour
- 1/2 cup Graham crackers, finely crushed (about 3.5 sheets)
- 1/4 tsp Salt
- 3/4 tsp Baking soda
Fillings
- 5 standard Hershey bars
- 1 1/2 cup Marshmallow fluff
Instructions
- Prepare the Pan: Preheat the oven to 350°F (175°C). Line an 8×8 inch baking pan with parchment paper and set aside.
- Cream Butter and Sugars: In a mixing bowl, cream together the softened butter, brown sugar, and granulated sugar until well combined and fluffy. Add the egg and vanilla extract, mixing again until smooth.
- Combine Dry Ingredients: Gradually add in the all-purpose flour, finely crushed graham crackers, salt, and baking soda. Mix just until the flour mixture is fully incorporated and no streaks remain in the dough.
- Form Base Layer: Press half of the cookie dough evenly into the prepared baking pan. Carefully remove the parchment with the dough from the pan and place it in the freezer to chill. Re-line the pan with fresh parchment paper.
- Add Chocolate and Marshmallow Layers: Break the Hershey bars into pieces and spread them evenly over the chilled cookie dough layer. Then, spread the marshmallow fluff evenly on top of the chocolate bars.
- Top with Remaining Dough: Remove the second half of the dough from the freezer and gently flip it on top of the marshmallow layer, working carefully to keep the dough layer intact.
- Bake: Bake the assembled s’mores cookie bars in the preheated oven for 25 minutes until golden and set.
- Cool and Serve: Allow the bars to cool completely before slicing to preserve the layers and achieve clean, beautiful cross-sections.
Notes
- For easier spreading, slightly warm the marshmallow fluff.
- Use parchment paper to prevent sticking and ease removal from the pan.
- Ensure the dough is chilled to prevent tearing when flipping over the marshmallow layer.
- Let the bars cool fully before cutting to avoid messy slices.
- Store bars in an airtight container at room temperature for up to 3 days or refrigerate for up to a week.
Nutrition
- Serving Size: 1 bar (approx. 2×2 inch)
- Calories: 320 kcal
- Sugar: 28 g
- Sodium: 150 mg
- Fat: 16 g
- Saturated Fat: 9 g
- Unsaturated Fat: 6 g
- Trans Fat: 0.1 g
- Carbohydrates: 38 g
- Fiber: 1 g
- Protein: 3 g
- Cholesterol: 40 mg
Keywords: s’mores cookie bars, easy s’mores dessert, chocolate marshmallow bars, campfire treats, chocolate cookie bars

