The Ultimate Soft & Chewy S’mores Crumble Bars: A Perfect Homemade Treat
Imagine sinking your teeth into a dessert that captures every magical essence of a traditional s’more, but elevated to a new level of deliciousness and convenience. Our Soft & Chewy S’mores Crumble Bars are precisely that—a dream come true for anyone who adores the classic campfire treat. These bars feature a irresistibly gooey milk chocolate and marshmallow center, perfectly nestled between two layers of tender, buttery graham cracker crumble. Forget the sticky fingers and crunchy, crumbling mess of a campfire s’more; these bars deliver all the nostalgic flavor in an effortlessly enjoyable, portable form.

There’s an undeniable charm to s’mores, a taste that instantly transports you back to childhood memories of starry nights and crackling campfires. Yet, the traditional s’more can be notoriously messy, often resulting in chocolate and marshmallow escaping their graham cracker confines. That’s where these Soft & Chewy S’mores Crumble Bars shine. They take everything you love about s’mores—the luscious melted chocolate, the fluffy toasted marshmallow, and the sweet graham cracker crunch—and transforms it into a sophisticated, yet utterly comforting, bar that’s easy to make, share, and enjoy anywhere.
Why These S’mores Crumble Bars Are a Game Changer
These isn’t just another s’mores-inspired dessert; these bars are truly revolutionary. Once you taste them, you might find yourself dreaming about their perfect balance of textures and flavors. Here’s why they’re poised to become your new favorite dessert:
- No Campfire Needed: Enjoy the authentic s’mores experience right from your kitchen, no open flame required.
- Mess-Free Indulgence: The soft, chewy graham cracker base and top crumble hold everything together beautifully, eliminating the usual sticky, crumbly chaos.
- Consistent Perfection: Every bite delivers a harmonious blend of gooey marshmallow, rich chocolate, and tender graham cracker. No more unevenly toasted marshmallows or half-melted chocolate squares!
- Portable & Shareable: Cut them into neat squares, and these bars become the ideal treat for parties, potlucks, lunchboxes, or a simple dessert on the go.
- Unforgettable Texture: The magic happens in the oven, where the chocolate ganache and marshmallow fluff melt together to create a perpetually soft, unbelievably decadent center. This mimics the melt-in-your-mouth texture of a freshly made campfire s’more, but with a delightful chewiness that traditional s’mores can’t match.

The Layers of Deliciousness: A Breakdown
The secret to these bars lies in their carefully constructed layers, each contributing to the overall symphony of taste and texture:
- Buttery Graham Cracker Crumble Base: We start with a foundation of soft, buttery graham cracker crumble. This isn’t your average hard cracker; it’s baked to a golden perfection, providing a tender and slightly chewy base that melts in your mouth.
- Fluffy Marshmallow Heart: A generous layer of marshmallow fluff creates the signature gooey center. As it bakes, it becomes wonderfully molten and stretchy, just like a marshmallow fresh from the flame.
- Rich Milk Chocolate Ganache: Poured over the marshmallow fluff is a smooth, creamy milk chocolate ganache. Made with high-quality milk chocolate and heavy cream, this ganache ensures a rich, luscious chocolate experience in every bite.
- More Graham Cracker Crumble & Mini Marshmallows: The masterpiece is then crowned with additional graham cracker crumble, adding another layer of texture and flavor, and a scattering of mini marshmallows that toast beautifully in the oven, providing a delightful chew and hint of caramelized sweetness.
During baking, the chocolate ganache and marshmallow fluff meld into one another, creating that iconic, perpetually soft and melty core. This ingenious combination truly captures the essence of a campfire s’more, where gooey marshmallow meets perfectly melted chocolate, but in a far more refined and enjoyable form.

Rave Reviews and Unanimous Approval
Don’t just take our word for it – these bars have earned enthusiastic praise from everyone who tries them. They’ve been described as seriously delicious, a dessert that truly lives up to its promise of magical flavors. In fact, one admirer was so impressed, he suggested selling each tiny bar for $2! It’s feedback like this that makes all the effort worthwhile. These Soft & Chewy S’mores Crumble Bars aren’t just a recipe; they’re an experience, designed to bring joy and satisfy even the most intense sweet cravings.

Tips for Perfect S’mores Crumble Bars
- Quality Ingredients Matter: Since s’mores are inherently simple, using high-quality milk chocolate and fresh graham cracker crumbs will make a noticeable difference in flavor. Ghirardelli is a great choice for chocolate.
- Room Temperature Butter: Ensure your butter is at true room temperature for the crumble base. This allows it to cream properly with the sugar, resulting in a tender, fluffy texture.
- Don’t Overmix: When adding the dry ingredients to the butter mixture, mix just until combined. Overmixing can develop the gluten in the flour, leading to a tougher crumble.
- Spreading Marshmallow Fluff: Marshmallow fluff can be tricky! A warm, buttered spatula or spoon works wonders for spreading it evenly over the baked base. The butter creates a non-stick surface, making the process much smoother.
- Cool Completely: This is crucial! While it’s tempting to cut into these bars warm, allowing them to cool completely (and even chilling them) ensures clean cuts and firm, well-set layers. Warm bars will be a delicious, but messy, heap.
- Parchment Paper is Your Friend: Lining your baking pan with parchment paper, with an overhang on the sides, makes it incredibly easy to lift the entire batch of bars out of the pan for cooling and cutting.

Creative Variations for Your S’mores Bars
While these Soft & Chewy S’mores Crumble Bars are perfect as is, feel free to experiment and make them your own!
- Chocolate Choices: Swap milk chocolate for dark chocolate ganache for a richer, less sweet flavor, or use a mix of both. White chocolate chips could also be a fun addition to the crumble topping.
- Add a Nutty Crunch: Sprinkle chopped nuts like pecans or walnuts over the chocolate ganache layer before adding the final crumble for an extra layer of texture and flavor.
- Salted Caramel Swirl: Drizzle a homemade or store-bought salted caramel sauce over the ganache before the top crumble for an indulgent twist.
- Espresso Boost: Add a teaspoon of instant espresso powder to your chocolate ganache to deepen the chocolate flavor and add a subtle coffee note.
- Spices: A pinch of cinnamon or nutmeg in the graham cracker crumble can add a warm, cozy dimension.
- Candy Mix-ins: Fold in chopped candy bars (like Snickers or Butterfingers) into the ganache or sprinkle them over the top for an extra treat.
Serving and Storage Suggestions
These S’mores Crumble Bars are perfect served at room temperature, but a slight chill can make them even firmer and easier to handle. Pair them with a scoop of vanilla bean ice cream for an extra decadent dessert experience. Leftovers can be stored in an airtight container at room temperature for up to 3-4 days, or in the refrigerator for up to a week. For longer storage, you can freeze individual bars wrapped tightly in plastic wrap and then placed in a freezer-safe bag for up to 1-2 months. Thaw at room temperature before enjoying.

Soft Chewy S’mores Crumble Bars
Chef Lindsey
10
mins
45
mins
55
mins
16
people
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Print Recipe
Ingredients
For the Crumble Base & Topping:
-
1
cup
unsalted butter
room temperature -
2 ¾
cups
graham cracker crumbs -
2
tablespoons
graham flour
you can also use whole wheat flour or all-purpose -
¾
cup
sugar -
1
large egg -
½
teaspoon
baking powder -
¾
teaspoon
kosher salt -
¾
teaspoon
pure vanilla extract
For the Remaining Layers
-
4.5
oz
milk chocolate
high quality, I use Ghirardelli -
2
tablespoons
heavy cream -
6.5
oz
jar of marshmallow fluff -
½
cup
mini marshmallows
or more to your taste
Instructions
Make the Crumble Base & Topping:
-
Preheat the oven to 350°F (175°C) and line an 8” x 8” baking pan with parchment paper, leaving an overhang for easy removal.
-
In a medium bowl, whisk together the graham cracker crumbs, graham flour (or substitute), salt, and baking powder. Set aside.
-
In the bowl of a stand mixer fitted with the paddle attachment, beat the unsalted butter and sugar together on medium-high speed until light and fluffy, about 2 minutes.
-
Reduce the mixer speed to medium. Add the large egg, mixing until thoroughly combined, approximately 2 minutes. Stir in the vanilla extract until just incorporated.
-
With the mixer on low speed, gradually add the dry mixture (graham cracker, flour, etc.) in several additions, scraping down the sides of the bowl as needed, until a cohesive crumble forms. Do not overmix.
-
Scoop about two-thirds (2/3) of this crumble mixture into the prepared baking pan. Press it down evenly with an offset spatula or the back of a spoon to form the base. Bake in the preheated oven for 15 minutes, or until the edges are set and the top begins to lightly brown. Cover the remaining crumble mixture and refrigerate until ready to use.
-
Remove the baked base from the oven and allow it to cool while you prepare the ganache.
Prepare Milk Chocolate Ganache:
-
In a microwave-safe bowl, combine the milk chocolate (chopped or chips) and heavy cream. Microwave on 50% power in 20-second intervals, stirring thoroughly after each interval, until the chocolate is fully melted and the mixture is smooth and glossy. Let it cool slightly to thicken to a spreadable consistency.
Assemble your bars:
-
Spread the marshmallow fluff evenly over the cooled, prebaked graham cracker base. A warm, buttered offset spatula or spoon will help considerably in spreading the sticky fluff with minimal mess.
-
Carefully pour the slightly cooled and thickened chocolate ganache over the marshmallow fluff layer. Using a clean offset spatula, spread the ganache evenly to cover the marshmallow.
-
Retrieve the reserved crumble topping from the refrigerator and generously crumble it over the chocolate ganache layer. Sprinkle the desired amount of mini marshmallows over the top of the crumble.
-
Return the pan to the preheated oven and bake for an additional 20-30 minutes, or until the crumble topping is golden brown and the mini marshmallows are beautifully toasted and slightly browned.
-
Allow the bars to cool completely to room temperature before attempting to cut and serve them. For best results and clean slices, you can chill them in the refrigerator for at least 1-2 hours after they’ve cooled. Cutting them warm will result in a delicious, but very messy, experience!
Notes
Nutrition
Calories:
294
kcal
|
Carbohydrates:
37
g
|
Protein:
2
g
|
Fat:
17
g
|
Saturated Fat:
10
g
|
Polyunsaturated Fat:
1
g
|
Monounsaturated Fat:
5
g
|
Trans Fat:
1
g
|
Cholesterol:
43
mg
|
Sodium:
226
mg
|
Potassium:
58
mg
|
Fiber:
1
g
|
Sugar:
25
g
|
Vitamin A:
397
IU
|
Vitamin C:
1
mg
|
Calcium:
27
mg
|
Iron:
1
mg
Dessert
American
294
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