S'mores Chocolate Cupcakes

Indulge in the ultimate campfire treat with these rich chocolate cupcakes featuring a crunchy graham cracker crust, a gooey marshmallow fluff center, and a beautifully toasted meringue frosting.

Why This Recipe Works:

• Graham Cracker Crust Base: A buttery, pre-baked graham cracker crust at the bottom of each liner provides a crunchy, authentic textural contrast to the soft cake.
• Post-Bake Filling Method: Filling the cupcakes after baking prevents the marshmallow from dissolving into the batter, ensuring a distinct, gooey center in every bite.
• Toasted Meringue Frosting: Using a kitchen torch on the marshmallow frosting caramelizes the sugars instantly, delivering that genuine campfire-smoke aroma.

I still have a tiny scar on my left thumb from childhood. It was my fault. I was trying to roast a marshmallow on a hot metal skewer and stubbornly refused to let go when it caught fire. That smoky, burnt-sugar memory stayed with me forever.

Some obsessions never really fade, which is why I also make S'mores Cookie Bars constantly.

My early attempts at baking these cupcakes were absolute disasters. They collapsed completely. I tried stuffing raw marshmallows directly into the chocolate batter, hoping they would melt into a perfect, gooey center during the bake. Instead, they dissolved into sticky caverns that ruined my pans.

Bear with me here. The science behind this baking failure is actually quite simple.

The science behind this sticky failure is incredibly simple. Sugar melts fast. Marshmallows are mostly whipped air and gelatin, meaning their delicate protein matrix collapses the second they hit high oven temperatures. You end up with a hollow, burnt mess.

So, what is the solution?

We must change the physical assembly of the cupcake. It works beautifully. First, we bake a deeply chocolatey cake base—similar to the rich base in my Double Chocolate Marshmallow Cookies—then we core the center and pipe in a stable, luscious marshmallow cream after baking. A quick torching of the frosting completes the campfire magic.

S'mores Chocolate Cupcakes

• Publisher Storied Skillet
• Cuisine American
• Category Desserts, Cupcakes
• Prep Time 20 mins
• Cook Time 18 mins
• Servings 12
• Calories 340 calories
• Rating 4.8 2791
• Tags s'mores cupcakes, chocolate marshmallow cupcakes, campfire desserts, easy baking

Ingredients

• 1 cup (100g) graham cracker crumbs
• 3 tbsp (42g) unsalted butter, melted
• 1 tbsp granulated sugar
• 1 cup (125g) all-purpose flour
• 1 cup (200g) granulated sugar
• 1/2 cup (45g) unsweetened cocoa powder
• 1 tsp baking powder
• 1/2 tsp baking soda
• 1/2 tsp Diamond Crystal kosher salt
• 1 large egg, room temperature
• 1/2 cup (120ml) whole milk
• 1/4 cup (60ml) vegetable oil
• 1/2 cup (120ml) hot water
• 1 jar (7 oz / 198g) marshmallow fluff
• 3 large egg whites
• 3/4 cup (150g) granulated sugar
• 1/4 tsp cream of tartar
• 1 tsp vanilla extract

Directions

1. Preheat your oven to 350°F (175°C) and line a 12-cup muffin tin with paper liners.
2. In a small bowl, mix the graham cracker crumbs, melted butter, and 1 tablespoon of sugar until it resembles wet sand. Press 1 tablespoon of the mixture firmly into the bottom of each cupcake liner. Bake for 5 minutes, then remove and let cool.
3. In a large bowl, whisk together the flour, sugar, cocoa powder, baking powder, baking soda, and salt. Add the egg, milk, and vegetable oil, whisking until smooth. Gently stir in the hot water (the batter will be very thin).
4. Divide the batter evenly among the 12 liners, filling them about two-thirds full over the baked crust. Bake for 16 to 18 minutes, or until a toothpick inserted into the center comes out clean. Let cool completely on a wire rack.
5. Using a cupcake corer or a small knife, cut a hole in the center of each cooled cupcake, going about halfway down. Spoon or pipe the marshmallow fluff into each cavity until level with the top of the cake.
6. To make the meringue frosting, combine egg whites, sugar, and cream of tartar in a heatproof bowl set over a pot of simmering water (double boiler). Whisk constantly for 3 to 4 minutes until the sugar is completely dissolved and the mixture is warm to the touch.
7. Remove the bowl from the heat and add the vanilla extract. Using a hand mixer or stand mixer fitted with the whisk attachment, beat on high speed for 5 to 7 minutes until stiff, glossy peaks form.
8. Pipe or spoon the meringue frosting generously onto the cupcakes. Use a kitchen torch to gently brown the meringue until toasted and golden. Serve immediately.

Notes

• Salt Conversion: I highly recommend using Diamond Crystal kosher salt. If you only have fine table salt, use exactly half the amount (1/4 teaspoon instead of 1/2 teaspoon) to avoid over-salting the delicate chocolate batter.
• The Hot Liquid Science: Adding hot water at the end of the batter mixing process is crucial. The heat gelatinizes the starches in the flour and blooms the cocoa powder, releasing oil-soluble flavor compounds for a much deeper chocolate flavor.
• Torching Safety Warning: When using a kitchen torch to brown the meringue, keep the flame moving constantly at a 45-degree angle about 3 inches away from the frosting. Meringue can catch fire in a split second; never leave the flame in one spot.
• Storage Behavior: These cupcakes are best enjoyed within 24 hours. Over time, the marshmallow fluff filling will slowly absorb moisture from the cake, causing the filling to liquefy slightly and make the graham cracker crust soggy.

Serving Suggestions

These decadent cupcakes are best served at room temperature, allowing the marshmallow filling to remain perfectly gooey. To elevate the presentation, garnish each toasted peak with a tiny graham cracker square and a drizzle of warm chocolate syrup.

• Warm Chocolate Drizzle: Drizzle a bit of high-quality dark chocolate ganache over the toasted meringue right before serving.
• Graham Cracker Shards: Press a small piece of graham cracker into the side of the frosting for a rustic, bakery-style look.
• Smoked Sea Salt: Sprinkle a tiny pinch of flaky smoked sea salt over the top to enhance the campfire aroma.
• Cold Milk Pairing: Serve alongside a tall, ice-cold glass of whole milk or oat milk to balance the rich sweetness.
• Espresso Shot: Pair with a fresh shot of espresso; the bitter coffee notes cut through the sweet marshmallow beautifully.

Storage and Reheating

If you happen to have leftovers, store them in a single layer inside an airtight container at room temperature. Do not refrigerate them under any circumstances. The cold fridge air will ruin the texture.

The refrigerator is the enemy of meringue.

In the fridge, the high humidity causes the toasted meringue frosting to weep, turning your beautiful glossy peaks into a sticky, watery mess. Additionally, the cold temperature will cause the butter in the graham cracker crust to seize up, making the base rock-hard instead of pleasantly crumbly.

For longer storage, you can freeze the un-frosted, cored cupcakes for up to three months. Just thaw and frost.

Ingredient Substitutes

If you need to adapt this recipe for dietary needs or pantry limitations, here are a few reliable swaps:

1. Marshmallow Fluff Substitute: If you cannot find marshmallow fluff, you can make a quick homemade marshmallow cream using melted marshmallows and a splash of corn syrup, or check out my guide on Chocolate Marshmallow Swirl Cookies for alternative filling ideas.
2. Vegetable Oil Substitute: You can substitute the vegetable oil with canola oil or melted coconut oil. Avoid olive oil as its strong flavor compounds will clash with the delicate chocolate.
3. Gluten-Free Option: To make these gluten-free, swap the all-purpose flour for a high-quality 1:1 gluten-free baking blend and use gluten-free graham crackers for the crust.
4. Egg-Free Meringue: For an egg-free version, you can whip aquafaba (the liquid from a can of chickpeas) with cream of tartar and sugar to create a beautiful vegan meringue frosting.

There is something incredibly comforting about bringing the outdoors inside, especially when it involves toasted sugar and melted chocolate. I hope these little cakes bring a bit of cozy campfire magic to your kitchen table—sticky fingers and all!