Easy S’mores Chocolate Cake – Stuffed with Marshmallow, Ganache & Crunch! (2 Hours Prep Time)

Easy S’mores Chocolate Cake: The Ultimate Campfire-Inspired Showstopper

When it comes to summer evenings, one of the best things is a s’more. The graham crackers, the chocolate, the toasty marshmallows – what’s not to love? In this S’mores Chocolate Cake, all those components come together to make an amazing cake inspired by the tasty classic treat. This cake is an incredible combination of moist chocolate cake, toasted marshmallow buttercream, graham cracker crunchies, and rich chocolate ganache! If you’re a s’mores lover, this cake is definitely for you. With layers of my best moist chocolate cake, a fluffy marshmallow frosting studded with real toasted marshmallows, a silky chocolate ganache filling, and a buttery, crunchy graham cracker layer, every bite is pure nostalgia and deliciousness. For another decadent layered dessert, try our S’mores Bars.

Why You’ll Love This S’mores Chocolate Cake Recipe

• All the S’mores Flavors in Cake Form: Toasted marshmallow, rich chocolate, and crunchy graham cracker in every single bite.
• Incredibly Moist Chocolate Cake: A tried-and-true, one-bowl chocolate cake recipe that’s perfectly tender and flavorful.
• Authentic Toasted Marshmallow Frosting: Real toasted marshmallows are mixed into a fluffy buttercream for an unbeatable, authentic flavor.
• Layers of Texture and Flavor: Silky ganache, creamy frosting, crunchy graham cracker bits, and moist cake create a symphony of textures.
• A True Showstopper: This cake is as beautiful as it is delicious – perfect for birthdays, summer parties, and any special occasion.

Your Simple Ingredients for the Perfect S’mores Chocolate Cake

For the Moist Chocolate Cake:

• 2 cups (260g) flour
• 2 cups (414g) sugar
• ¾ cup (85g) natural unsweetened cocoa powder
• 2 tsp baking soda
• 1 tsp salt
• 2 large eggs
• 1 cup (240ml) milk
• 1 cup (240ml) vegetable oil
• 1½ tsp vanilla extract
• 1 cup (240ml) hot water

For the Graham Cracker Crunchies:

• ¾ cup (100g) graham cracker crumbs (about 6 full sheets)
• 1½ tbsp (20g) sugar
• ¼ cup (56g) unsalted butter, melted

For the Toasted Marshmallow Frosting:

• 1¾ cups (392g) unsalted butter, room temperature
• 3¼ cups (approx. two 7oz jars) marshmallow fluff
• 6 cups (690g) powdered sugar
• 1½ cups mini marshmallows

For the Chocolate Ganache:

• 9 oz (1½ cups) semi-sweet chocolate chips
• ¾ cup (180ml) heavy whipping cream

For the Vanilla Frosting (for the dam):

• ¾ cup (168g) unsalted butter, room temperature
• 3 cups (345g) powdered sugar
• 1 tsp vanilla extract
• 1 tbsp milk or cream

Pro Tip: The Secret to a Stable, Beautifully Layered Cake
The “vanilla frosting dam” is a crucial technique for this cake. Piping a ring of thicker vanilla frosting around the edge of each cake layer creates a barrier that holds all the delicious, softer fillings (ganache, marshmallow frosting, and crunchies) securely in place, preventing them from oozing out the sides. It ensures clean, beautiful layers every time.

How to Make the Perfect S’mores Chocolate Cake

Phase 1: Make the Chocolate Cake Layers

Prep and Preheat: Preheat your oven to 300°F (148°C) . Prepare three 8-inch round cake pans by lining the bottoms with parchment paper rounds and greasing the sides.
Mix Dry Ingredients: In a large bowl, whisk together the flour, sugar, cocoa powder, baking soda, and salt.
Add Wet Ingredients: Add the eggs, milk, and vegetable oil to the dry ingredients. Mix well until combined.
Add Hot Water: Add the vanilla to the hot water, then pour the hot water mixture into the batter. Mix well. The batter will be very thin – this is correct!
Bake: Divide the batter evenly among the three prepared pans. Bake for 30-33 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs. Cool in pans for 5-10 minutes, then turn out onto wire racks to cool completely.

Phase 2: Make the Graham Cracker Crunchies

Prep and Bake: Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper. In a bowl, combine the graham cracker crumbs, sugar, and melted butter. Stir until well combined. Spread the mixture evenly onto the prepared baking sheet.
Bake and Cool: Bake for 8-10 minutes, then remove from the oven and allow to cool completely. These will become your crunchy layers.

Phase 3: Make the Toasted Marshmallow Frosting

Toast the Marshmallows: Place the mini marshmallows on a baking sheet and toast them under the broiler for about 1 minute, watching carefully, until they are golden and toasted. Set aside to cool completely. Once cool, break them apart if they are clumped.
Make the Frosting: In a large mixer bowl, beat the room temperature butter until smooth. Add the marshmallow fluff and beat until well combined.
Add Sugar: Gradually add the powdered sugar, about half at a time, mixing until smooth and well combined after each addition.
Add Toasted Marshmallows: Gently mix in the cooled, toasted marshmallows until they are evenly distributed throughout the frosting. Set aside.

Phase 4: Make the Chocolate Ganache

Heat Cream: Place the chocolate chips in a medium heatproof bowl. Heat the heavy whipping cream in a small saucepan until it just begins to simmer (do not boil).
Combine: Pour the hot cream over the chocolate chips. Let it sit undisturbed for 3-5 minutes.
Whisk: Gently whisk the mixture until it is completely smooth and glossy. Set aside to cool slightly.

Phase 5: Make the Vanilla Frosting (for the dam)

Make Frosting: In a large mixer bowl, beat the room temperature butter until smooth. Add about half of the powdered sugar and mix until well combined. Add the vanilla extract and milk, then add the remaining powdered sugar and mix until smooth. This frosting should be thicker and more stable.

Phase 6: Assemble the S’mores Cake

Level the Cakes: Use a serrated knife to level the tops of the cooled cake layers, removing any domes.
Layer 1: Place the first cake layer on your serving plate or cake board. Pipe a ring (a “dam”) of the vanilla frosting around the top outer edge of the cake.
Fill: Spread about 6 tablespoons of chocolate ganache inside the dam. Then, spread about 1 cup of toasted marshmallow frosting over the ganache. Finally, sprinkle about ½ cup of graham cracker crunchies over the marshmallow layer.
Layer 2: Gently place the second cake layer on top. Repeat the process: pipe a vanilla frosting dam, add ganache, marshmallow frosting, and graham cracker crunchies.
Layer 3: Top with the final cake layer. Refrigerate the assembled cake for about 30 minutes to let the fillings firm up.

Phase 7: Frost and Decorate

Frost the Outside: Use the remaining toasted marshmallow frosting to frost the entire outside of the cake.
Add Crunchies: Gently press the remaining graham cracker crunchies onto the bottom part of the frosted cake.
Add Chocolate Drip: If the ganache has thickened too much, gently warm it in the microwave in short bursts. Use a spoon or squeeze bottle to create a chocolate drip around the top edge of the cake, then fill the top center with more ganache.
Toast the Marshmallows: Arrange extra mini marshmallows around the top edge of the cake. Use a kitchen torch to carefully toast them until golden and slightly charred.
Serve: Refrigerate the cake until ready to serve. For the best flavor and texture, serve cool, not cold.

Pro Tips & Easy Variations for Your S’mores Cake

• Don’t Be Afraid of the Thin Batter: The chocolate cake batter is intentionally very thin. This is what creates its incredibly moist, tender crumb. Trust the recipe!
• Toast Marshmallows Carefully: Watch the marshmallows like a hawk under the broiler – they can go from perfectly toasted to burnt in seconds.
• Make Ahead: You can bake the cake layers a day ahead and wrap them tightly in plastic wrap. The graham cracker crunchies can also be made ahead and stored in an airtight container.
• No Kitchen Torch? You can toast the marshmallows for the topping under the broiler just before serving, or skip the toasting step for a softer marshmallow topping.
• Graham Cracker Crunch Variations: Add a pinch of cinnamon to the crunchie mixture for extra warmth.

Serving Suggestions for the Ultimate Party Dessert

This cake is a showstopper all on its own. Serve it as the grand finale to a summer barbecue, a birthday party, or any celebration. It’s wonderful with a glass of cold milk, a scoop of vanilla ice cream, or – of course – around a campfire for the full s’mores experience.

Nutrition Information

(Approximate per slice, based on 12-14 slices) Calories: 1193, Fat: 61g, Carbohydrates: 164g, Protein: 7g, Sugar: 134g. A rich, decadent, special-occasion dessert.

Storage & Make-Ahead Instructions

• Refrigerate: This cake is best stored in an airtight container in the refrigerator. It will keep well for 3-4 days.
• Serve Cool: For the best flavor and texture, serve the cake cool, but not straight from the fridge. Let it sit at room temperature for 15-20 minutes before serving.
• Freeze Cake Layers: Unfrosted cake layers can be wrapped tightly in plastic wrap and frozen for up to 3 months.

Your S’mores Chocolate Cake Questions Answered

1. Can I use a different size pan?
   • This recipe is designed for three 8-inch pans. Using a different size will affect baking time and layer height. For two 9-inch pans, you may need to adjust baking time and the amount of filling.
2. Can I use milk chocolate instead of semi-sweet for the ganache?
   • Semi-sweet is recommended to balance the sweetness of the cake and frosting, but you can use milk chocolate for a sweeter, less intense chocolate flavor.
3. I don’t have marshmallow fluff. What can I use?
   • You could make a traditional Swiss meringue buttercream and then add the toasted marshmallows for a similar effect. The texture will be different, but still delicious.
4. My cake layers are domed. How do I fix that?
   • Use a large serrated knife to carefully slice the domed tops off to create a flat, even surface. This is essential for a stable, level cake.
5. How long can this cake sit out at room temperature?
   • While buttercream can technically sit out, this cake contains multiple fillings and is best kept refrigerated. For serving, it can sit out for an hour or two, but should be returned to the fridge.

More Incredible S’mores-Inspired Treats to Try

If you love this showstopping cake, you’ll adore our other rich and delicious dessert creations. Our Coffee Chocolate Cake is another decadent layer cake, and our Espresso Brownies are the perfect fudgy treat for coffee lovers.

The Story Behind This Campfire-Inspired Masterpiece

S’mores Chocolate Cake is a beautiful tribute to the nostalgic joy of a classic campfire treat. This recipe takes the simple, beloved combination of graham crackers, chocolate, and toasted marshmallow and elevates it into an elegant, multi-layered dessert that captures all the magic of a s’more in every single bite. The toasted marshmallow frosting, studded with real torched marshmallows, provides that authentic, smoky-sweet flavor, while the rich ganache and buttery graham cracker crunchies complete the experience. It’s a testament to the idea that the most comforting, childhood memories can be transformed into something truly spectacular for special celebrations. This wonderfully creative and delicious recipe is inspired by the version shared on Life, Love and Sugar by Lindsay.

Pin This Showstopping Recipe For Your Next Celebration!

This s’mores chocolate cake will be the talk of any party. Save this image to your “Cake Recipes” or “Summer Desserts” Pinterest board so you always have this impressive recipe ready. Did you make this beautiful, decadent cake? We’d love to see your creation – tag us in your photos!