Decadent S’more Cookie Bars

Featured in: Sweet Endings and Treats

These s'more cookie bars combine all the nostalgic flavors of a campfire favorite in one easy pan dessert. A buttery dough comes together with brown sugar, graham cracker crumbs, and chocolate chips to form a chewy base. Melting chocolate chunks provide a rich layer, while mini marshmallows add gooey pockets throughout each bite. Once baked to a golden finish and topped with extra marshmallows, these bars deliver irresistible texture and flavor—perfect for gatherings or everyday indulgence.

A smiling woman in a chef's jacket stands in a commercial kitchen, looking at the camera with various food containers and utensils in the background.
Updated on Fri, 23 May 2025 13:43:01 GMT
A close up of a dessert with white and brown toppings. Pin it
A close up of a dessert with white and brown toppings. | tasteofcook.com

Nothing says celebration quite like the gooey nostalgia of these s’more cookie bars Rich chocolate melty marshmallows and golden cookie crust combine to deliver all the fireside flavor of a classic treat straight from your kitchen I have brought this recipe to countless parties and potlucks and it always vanishes long before the night is over

The first time I made these my kids licked the bowl clean and could not stop sneaking squares from the pan Now whenever we are craving something truly indulgent s’more cookie bars are our go to treat

Ingredients

  • Unsalted butter: Creates richness and softness choose high quality butter for best texture
  • Brown sugar: Adds moisture and a subtle caramel flavor look for fresh tightly packed brown sugar
  • Granulated sugar: Balances the sweetness and helps achieve chewy edges
  • Eggs: Bind everything and keep the bars tender Always use large eggs at room temperature for smooth mixing
  • Vanilla extract: Rounds out the flavor pure vanilla is worth the splurge
  • All purpose flour: Forms the base sift for a lighter texture
  • Baking soda: Ensures lift check your freshness for best results
  • Salt: Balances flavors use a fine salt for even distribution
  • Graham cracker crumbs: Give that classic s’more taste crush your own for best flavor
  • Semi sweet chocolate chips: Melt into pools of chocolate stick to a good brand with rich cocoa notes
  • Mini marshmallows: Melt into pockets of gooey goodness fresh marshmallows are a must
  • Chocolate chunks or bar pieces: Add dramatic ribbons of chocolate on top dark or milk based on your preference

Step-by-Step Instructions

Prepare the Pan:
Grease a nine by thirteen inch baking pan or line it with parchment paper for easy removal This ensures clean cuts and easy serving
Cream the Butter and Sugars:
In a large bowl use a hand or stand mixer to beat together the softened butter brown sugar and granulated sugar Spend about three minutes mixing until the blend is light and fully combined
Add Eggs and Vanilla:
Crack in the eggs one at a time mixing slowly just until combined after each addition Stir in the vanilla extract to evenly disperse its aroma
Combine Dry Ingredients:
In a separate bowl whisk together the flour baking soda salt and graham cracker crumbs Make sure there are no clumps then gradually add the dry mix to the wet batter Mix with a spatula until just combined to avoid overmixing
Fold in the Chocolates and Marshmallows:
Gently fold in the semi sweet chocolate chips and mini marshmallows Make sure they are evenly distributed but do not overwork the dough
Spread Half the Dough:
Transfer half of the dough into the prepared pan Use a spatula or your hands to press it smoothly and evenly into a base layer
Add the Chocolate Chunks:
Scatter the chocolate chunks or bar pieces across the surface so every bite features melt in your mouth chocolate
Top with Remaining Dough:
Drop spoonfuls or crumble the remaining dough on top Press gently so there are pockets where marshmallow can peek through
Bake to Gooey Perfection:
Place the pan in the preheated oven Bake for about twenty five to thirty minutes until the edges are golden and the center is just set Test with a toothpick for moist crumbs not wet batter
Cool and Decorate:
Remove the pan and let rest for about ten minutes While still warm sprinkle extra mini marshmallows on top and add a drizzle of melted chocolate for extra flair
Slice and Serve:
Let the bars cool completely for the neatest cuts Run a sharp knife under hot water to make slicing easy Serve and enjoy your gooey decadent treat
A piece of cake with chocolate chips and marshmallows on top. Pin it
A piece of cake with chocolate chips and marshmallows on top. | tasteofcook.com

Graham cracker crumbs are my secret weapon in this recipe They bring an unmistakable nostalgia and truly set these bars apart I will always remember my daughter’s delighted face when she first tasted that familiar campfire flavor in a homemade treat

Storage Tips

These cookie bars stay soft for days at room temperature if you keep them in an airtight container For even longer storage wrap each bar in parchment and freeze in batches up to two months I love popping a frozen square in my snack bag for picnics or road trips and they taste freshly baked when thawed

Ingredient Substitutions

You can easily swap the semi sweet chocolate chips for milk or dark chocolate if you like extra indulgence If you do not have mini marshmallows cut up full size marshmallows with a clean kitchen shears Gluten free all purpose flour makes a great substitute without changing the flavor much Nut butters can substitute some butter for a fun twist though I always return to classic

Serving Suggestions

Plate these with a scoop of vanilla ice cream or drizzle warm caramel sauce for tons of wow factor At family gatherings I often cut them into smaller bite sized squares and stack on a tiered tray for grab and go treats Everyone loves the mix of textures and kid friendly flavors

A stack of chocolate chip cookies with marshmallows on top. Pin it
A stack of chocolate chip cookies with marshmallows on top. | tasteofcook.com

Once you get the hang of mixing and layering the dough this recipe is pure fun to make and even more fun to share The combination never fails to bring out smiles and spark memories of campfires and laughter

Frequently Asked Questions

→ Can I use milk chocolate instead of semi-sweet chips?

Yes, milk chocolate can be used for a sweeter flavor, though semi-sweet balances sweetness with depth.

→ What’s the best way to cut the bars cleanly?

Let bars cool completely, then use a sharp knife wiped clean between slices for neat edges.

→ Can I substitute other types of cookies for graham crackers?

Digestive biscuits or vanilla wafers are great alternatives if graham crackers are unavailable.

→ How should I store leftover cookie bars?

Store in an airtight container at room temperature for up to 3 days, or refrigerate for longer keeping.

→ Can I freeze the cookie bars?

Yes, freeze in airtight layers separated by parchment for up to 2 months. Thaw before enjoying.

Decadent S’more Cookie Bars

S’more-inspired bars layered with chocolate, graham crackers, and marshmallows for an irresistible treat.

Prep Time
20 Minutes
Cook Time
30 Minutes
Total Time
50 Minutes


Difficulty: Intermediate

Cuisine: American

Yield: 24 Servings (24 bars)

Dietary: Vegetarian

Ingredients

→ Base and Dough

01 226 grams unsalted butter, softened
02 200 grams packed brown sugar
03 100 grams granulated sugar
04 2 large eggs
05 5 milliliters vanilla extract
06 312 grams all-purpose flour
07 5 grams baking soda
08 2.5 grams salt
09 100 grams graham cracker crumbs

→ Mix-ins and Toppings

10 175 grams semi-sweet chocolate chips
11 50 grams mini marshmallows
12 90 grams chocolate chunks or chocolate bar pieces

Instructions

Step 01

Preheat oven to 175°C. Grease a 23x33 cm baking pan or line with parchment paper for easy removal.

Step 02

In a large bowl, beat softened butter, brown sugar, and granulated sugar until creamy and thoroughly combined.

Step 03

Add eggs one at a time, mixing well after each addition. Stir in vanilla extract.

Step 04

In a separate bowl, whisk together flour, baking soda, salt, and graham cracker crumbs.

Step 05

Gradually add the dry mixture to the wet mixture, mixing until just combined. Do not overmix.

Step 06

Gently fold in semi-sweet chocolate chips and mini marshmallows, ensuring even distribution.

Step 07

Spread half of the dough evenly in the prepared pan and press gently with a spatula.

Step 08

Evenly distribute chocolate chunks or bar pieces over the dough layer.

Step 09

Crumble the remaining dough over the chocolate layer, spreading as evenly as possible.

Step 10

Bake for 25–30 minutes or until the edges are golden and a toothpick inserted into the centre comes out with moist crumbs.

Step 11

Remove from oven and let cool in the pan for 10 minutes. While warm, top with extra mini marshmallows and drizzle melted chocolate, if desired.

Step 12

Allow to cool fully before cutting into squares. Serve once set.

Notes

  1. Do not overbake; cookie bars should remain slightly soft in the centre for optimal texture.

Tools You'll Need

  • Mixing bowls
  • Electric hand mixer or stand mixer
  • 23x33 cm baking pan
  • Spatula
  • Measuring cups and spoons
  • Whisk
  • Parchment paper

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Contains wheat, eggs, milk, and soy. May also contain traces of nuts if using certain chocolates.

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 267
  • Total Fat: 11.2 g
  • Total Carbohydrate: 36.5 g
  • Protein: 2.9 g