Homemade S'mores Bars with Chocolate Ganache and Marshmallow

Indulge in these decadent, gooey homemade s'mores bars featuring a buttery graham cracker crust, rich chocolate ganache, and toasted marshmallows.

Why This Recipe Works:

• A velvety chocolate ganache replaces standard chocolate bars, ensuring a soft, sliceable bite even after chilling.
• Pre-baking the graham cracker crust prevents it from turning into a soggy, crumbly mess under the heavy toppings.
• A quick broil mimics the campfire char, giving you perfectly toasted, gooey marshmallow tops without a blowtorch.

I still remember the summer of 2018 when I tried to make s'mores over a temperamental backyard fire pit and dropped my marshmallow into the ash. It was a tragic, sticky mess that left me determined to recreate that campfire magic indoors.

So, I brought the campfire to my kitchen.

My early attempts at baking these bars failed miserably because I simply layered standard chocolate bars over an unbaked graham cracker crust. When cooled, the chocolate seized into a rock-hard, tooth-shattering sheet, while the crust disintegrated into sandy dust. Think about this in terms of physics: without a proper fat-to-liquid ratio, chocolate cannot remain pliable once cooled. It was a complete disaster that required a chisel to serve.

To fix this, I turned to a velvety chocolate ganache. The heavy cream keeps the chocolate layer incredibly soft and sliceable.

If you want a lighter, protein-packed alternative, you can always try my Protein Graham Cracker S'mores Bars. But today, we are going for pure, unadulterated decadence. We are talking about buttery crumbs pressed with your knuckles until your palms ache, topped with a glossy ganache and toasted marshmallows.

Trust me, it is worth it.

Homemade S'mores Bars with Chocolate Ganache and Marshmallow

• Publisher Storied Skillet
• Cuisine American
• Category Dessert, Bars
• Prep Time 20 mins
• Cook Time 15 mins
• Servings 16
• Calories 320 calories
• Rating 4.8 4127
• Tags s'mores bars, chocolate ganache, marshmallow dessert, graham cracker crust, easy baking

Ingredients

• 2 cups graham cracker crumbs (about 14 full sheets)
• 1/2 cup unsalted butter, melted
• 1/4 cup granulated sugar
• 1/2 tsp Diamond Crystal kosher salt
• 12 oz high-quality semi-sweet chocolate chips
• 1 cup heavy whipping cream
• 1 tsp pure vanilla extract
• 4 cups mini marshmallows

Directions

1. Preheat your oven to 350°F (175°C) and line an 8x8-inch baking pan with parchment paper, leaving an overhang for easy removal.
2. In a medium bowl, stir together the graham cracker crumbs, melted butter, granulated sugar, and kosher salt until it resembles wet sand.
3. Press the mixture firmly into the bottom of the prepared pan using the flat bottom of a measuring cup to ensure a tight, even layer.
4. Bake the crust for 8 to 10 minutes until lightly golden and fragrant, then set aside to cool slightly.
5. Place the chocolate chips in a heatproof bowl, heat the heavy cream in a small saucepan until just simmering, then pour it over the chocolate.
6. Let the cream and chocolate sit undisturbed for 2 minutes, then whisk gently from the center outward until a smooth, glossy ganache forms.
7. Stir in the vanilla extract, then pour the warm ganache over the baked crust, spreading it into an even layer.
8. Scatter the mini marshmallows evenly over the ganache layer, pressing them down very gently so they cling to the chocolate.
9. Turn the oven to broil (high) and place the pan on the middle rack for 1 to 2 minutes, watching constantly, until the marshmallows are toasted to a deep golden brown.
10. Allow the bars to cool completely at room temperature, then chill in the refrigerator for at least 2 hours before slicing with a hot knife.

Notes

• I highly recommend using Diamond Crystal kosher salt; if you only have fine table salt, reduce the measurement by half (use 1/4 teaspoon instead of 1/2 teaspoon) to avoid an overly salty crust.
• The heavy cream in the ganache acts as an emulsifier, preventing the chocolate's fat and cocoa solids from separating and seizing into a rock-hard layer when chilled.
• Do not walk away from the oven during the broiling step. Marshmallows transition from perfectly toasted to a charred, smoking fire hazard in a matter of seconds.
• After a day in the fridge, the marshmallow topping will lose some of its initial fluffiness and become delightfully chewy, while the graham cracker crust will soften slightly but retain its buttery structure.
• If you love this flavor profile but want a cookie format, check out my S'mores Thumbprint Cookies or try these decadent S'mores Brownies.

Serving Suggestions

These rich, gooey bars are a showstopper on their own, but you can easily elevate the experience with a few simple pairings and presentation tricks.

• Serve alongside a cold glass of milk or a hot cup of black coffee to balance the intense sweetness of the ganache.
• Top each bar with a tiny pinch of flaky sea salt right before serving to enhance the chocolate flavor.
• Pair them with a scoop of vanilla bean ice cream or even a dollop of Protein Chocolate Chip Dip for an over-the-top dessert platter.
• Slice them into tiny, bite-sized squares for a party platter, as a little goes a very long way with these rich bars.
• Warm them slightly in the microwave for 5 to 10 seconds if you prefer a warm, ultra-gooey texture over a clean, chilled slice.

Storage and Reheating

Storing these bars is incredibly simple, though they rarely last long enough to require it. Keep them in an airtight container in the refrigerator for up to five days to maintain the integrity of the ganache.

Do not freeze them.

The freezing and thawing process completely ruins the delicate texture of the toasted marshmallows, turning them into a weeping, sticky mess. Keep them chilled instead.

When you are ready to enjoy one, you can eat it straight from the fridge for a fudge-like texture. Alternatively, let it sit on the counter for twenty minutes to soften up naturally.

A quick microwave zap works too.

Ingredient Substitutes

If you find yourself missing an ingredient or need to adapt to dietary restrictions, here are some reliable swaps that won't ruin the chemistry of the bars.

1. Graham Crackers: If you cannot find graham crackers, digestive biscuits or Biscoff cookies make an incredibly flavorful alternative crust.
2. Heavy Cream: You can substitute canned full-fat coconut milk for the heavy cream in a 1:1 ratio to make the ganache layer dairy-free.
3. Semi-Sweet Chocolate: Feel free to use dark chocolate chips (60% cacao or higher) if you prefer a less sweet, more intense chocolate flavor profile.
4. Marshmallows: If you want a fun twist, use flavored marshmallows or even a layer of marshmallow fluff, though fluff will not toast as cleanly under the broiler.

I hope these bars bring a little bit of that cozy, sticky-fingered campfire joy into your kitchen without any of the smoke or ash. Let me know how yours turn out, and don't forget to keep a close eye on that broiler!