The Best s’mores cookie bars

Imagine biting into a chewy cookie bar layered with melted chocolate and gooey marshmallow fluff. These s’mores cookie bars combine summer campfire memories with bakery-quality goodness – all in your oven.

Perfect for birthday parties, picnics, or late-night cravings, this easy dessert delivers smiles with every sweet square. Better yet? You won’t need a campfire or skewers to make this crowd-pleasing treat.

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

This simple recipe lets you capture s’mores magic in bar form. First, you’ll love how easy these come together- no babysitting individual cookies.

Second, the graham cracker-infused dough adds authentic campfire flavor. Third, the combination of velvety chocolate and fluffy marshmallow creates irresistible layers. Plus, these bars travel well for potlucks and stay delicious for days.

Parents especially appreciate this as a fun dessert to make with kids. Little hands can help crush graham crackers or spread marshmallow fluff.

Cleanup stays manageable since everything bakes in one pan. The recipe makes 16 generous squares, though don’t be surprised if they disappear faster than you expect!

Recipe

Print

Ingredients and Substitutions

We use basic pantry items to create these unforgettable bars. Each component serves an important purpose, but substitutions can accommodate dietary needs.

Base Components

• Butter: 1/2 cup (113 g) unsalted or salted butter, softened. Vegan butter works identically.
• Sugars: 1/3 cup (75 g) brown sugar and 1/4 cup (50 g) granulated sugar
• Egg: 1 large egg binds the dough. For egg-free, use 1/4 cup applesauce
• Vanilla Extract: 1 teaspoon enhances flavors without overpowering

Dry Ingredients

• Flour: 1 1/2 cups (185 g) all-purpose flour. Gluten-free 1:1 flour works perfectly
• Graham Crackers: 1/2 cup finely crushed (about 3.5 sheets). Substitute digestive biscuits if unavailable
• Leaveners: 3/4 teaspoon baking soda and 1/4 teaspoon salt for balanced rise

Toppings

• Chocolate Bars: 5 standard Hershey bars (54 g total) for nostalgic flavor. Replace with dairy-free chocolate if needed
• Marshmallow Fluff: 1 1/2 cups (270 g) creates the iconic gooey layer

How to Make S’mores Cookie Bars

This foolproof recipe builds layer by layer. Follow these steps for perfectly baked bars every time.

Step 1: Prepare Pan and Oven

Preheat your oven to 350°F (175°C). Line an 8×8 inch baking pan with parchment paper, leaving some overhang on two sides. This acts as a sling for easy removal later. Set the pan aside while making dough.

Step 2: Make Cookie Dough

In a mixing bowl, cream softened butter, granulated sugar, and brown sugar until combined. Add egg and vanilla extract. Stir again until smooth. Gradually mix in flour, crushed graham crackers, salt, and baking soda. Stop when no dry streaks remain – do not overmix.

Step 3: Layer Ingredients

Press half the dough evenly into your prepared pan. Transfer pan to freezer for 10 minutes. Meanwhile, line another 8×8 surface with fresh parchment. Press remaining dough here to form an identical layer. Arrange chocolate bars evenly over the chilled dough. Spread marshmallow fluff over chocolate. Carefully flip the second dough layer onto the fluff, peeling off its parchment gently.

Step 4: Bake and Cool

Bake for 25 minutes until edges turn golden brown. The center will look slightly underdone but firms upon cooling. Let bars cool completely (about 2 hours) before slicing. Rushing this step causes messy cuts and collapsed layers. For clean squares, use a sharp knife wiped between cuts.

Pro Tips for Success

Over years of testing, these insider tricks guarantee perfect results:

• Chill dough layers: Freezing prevents the layers from mixing during assembly. This creates distinct s’mores components.
• Distribute chocolate evenly: Break apart chocolate bars to cover all corners. No one likes chocolate-free bites!
• Measure fluff with oiled utensils: Lightly coat your measuring cup and spatula with cooking spray to prevent sticky messes.
• Broil option: For toasted marshmallow flavor, broil cooled bars for 1-2 minutes (watch closely!).
• Double for crowds: Simply bake in a 9×13 pan, increasing ingredients by 50% but keeping same bake time.

Flavor Variations

While classic s’mores satisfy most, these tweaks add exciting twists:

• Nutty Crunch: Add 1/2 cup chopped walnuts or pecans to the dough
• Salty Sweet: Sprinkle 1/2 teaspoon flaky sea salt over chocolate layer
• Peanut Butter Swirl: Replace 1/4 cup marshmallow fluff with warmed peanut butter
• Berry Bliss: Layer 1/2 cup freeze-dried raspberries under the marshmallow
• Cinnamon Roll Vibes: Mix 1 tablespoon cinnamon into graham cracker crumbs

Serving Suggestions

These bars shine solo but pair wonderfully with:

• Cold glasses of milk or hot chocolate for maximum nostalgia
• Fresh fruit platters to balance sweetness
• Vanilla ice cream for indulgent dessert nachos (crumble bars over scoops!)
• Light savory dishes like our comforting chicken pot pie soup for a complete meal
• Hot tea or coffee during afternoon breaks

Storage and Freezing Instructions

Store bars in an airtight container at room temperature for up to 3 days. For longer storage, refrigerate 1 week. The marshmallow layer does get stickier when cold, so let slices sit at room temperature 15 minutes before serving. Freeze unfrosted baked bars for best results:

• Cool bars completely after baking
• Wrap tightly in plastic wrap followed by foil
• Freeze 3 months maximum
• Thaw overnight in refrigerator before decorating and cutting

For grab-and-go treats, freeze individual portions. Pair frozen bars with a thermos of our hearty instant pot rice soup for easy packed lunches.

Nutrition Facts per Serving

Calories	Fat	Carbs	Protein	Fiber	Sugar	Sodium
208 kcal	8 g	32 g	3 g	1 g	17 g	321 mg

FAQs About S’mores Cookie Bars

Can I use homemade marshmallow instead of fluff?

While possible, homemade marshmallow tends to melt more than fluff during baking. If substituting, spread your homemade marshmallow very thinly over the chocolate layer.

Why did my chocolate sink into the dough?

This happens if the dough wasn’t chilled long enough before assembly. Always freeze the bottom layer at least 10 minutes. Using thicker chocolate bars also helps prevent sinking.

Can I prepare these gluten-free?

Yes! Use gluten-free graham crackers and 1:1 gluten-free flour. Brands like Pamela’s work beautifully. Double-check chocolate labels for GF certification.

How do I prevent burnt edges?

Lower oven temperature to 325°F (163°C) and bake 5 minutes longer. Cover lightly with foil during last 10 minutes if edges still darken too fast.

What’s the best way to cut clean bars?

Use a sharp chef’s knife warmed under hot water and dried. Make swift downward cuts without sawing. Wipe the blade between slices using a damp cloth.

Final Thoughts

These s’mores cookie bars deliver campfire nostalgia in easy oven-baked form. Balance the sweet treat with savory dishes like our creamy copycat Panera broccoli cheese soup for a satisfying meal.

Now that you have this recipe, consider yourself equipped to handle any last-minute dessert emergency, bake sale contribution, or family movie night.

The layers of chocolate, marshmallow, and graham cracker create fireworks of flavor in every bite. Grab your mixing bowl and start baking smiles today!