Why You’ll Love S’mores Cake Recipe

I love how this cake combines soft chocolate cake with the familiar flavors of s’mores. The graham cracker base adds a delicious crunch while the marshmallow fluff creates a creamy, gooey texture that reminds me of toasted marshmallows by the fire. This dessert is perfect for parties, birthdays, or whenever I want a crowd-pleasing treat.

I also appreciate that the recipe uses simple ingredients and comes together without complicated decorating techniques. The dark chocolate ganache gives the cake a rich finish that balances the sweetness beautifully.

Ingredients

(Note: All ingredient amounts are listed in the recipe card below.)

250g digestive biscuits or graham crackers

90g unsalted butter (melted)

2 eggs (room temperature)

300g granulated sugar

240ml buttermilk

120ml oil

120g cocoa powder

Marshmallow fluff

Dark chocolate (for ganache)

Directions

I start by preheating the oven to 350°F (175°C) and greasing a 9×13 inch baking pan to prevent sticking.

In a large mixing bowl, I combine the melted butter with the crushed digestive biscuits or graham crackers until evenly coated. I add the eggs one at a time and mix thoroughly after each addition.

Next, I stir in the granulated sugar, buttermilk, oil, cocoa powder, and hot coffee until the batter becomes smooth and rich.

In a separate bowl, I whisk together the flour, baking soda, baking powder, and salt. I gradually fold the dry ingredients into the wet mixture, mixing only until combined to keep the cake tender.

I pour the batter into the prepared baking pan and bake for about 30 minutes, or until a toothpick inserted into the center comes out clean.

Once baked, I allow the cake to cool completely before spreading marshmallow fluff over the top and finishing with dark chocolate ganache.

Servings and Timing

This recipe serves approximately 12 slices.

Prep Time: 20 minutes

Cook Time: 30 minutes

Total Time: 50 minutes

Variations

I sometimes add mini chocolate chips into the batter for extra chocolate flavor throughout the cake. Crushed graham crackers sprinkled on top also add texture and make the presentation even more appealing.

For a more toasted marshmallow flavor, I lightly toast the marshmallow fluff with a kitchen torch before serving. I also enjoy using milk chocolate instead of dark chocolate when I want a sweeter finish.

If I want a layered presentation, I bake the batter in round cake pans and stack the layers with marshmallow frosting in between.

Storage/Reheating

I store leftover cake in an airtight container in the refrigerator for up to 4 days. The marshmallow topping stays fresh and creamy when chilled properly.

Before serving, I like letting the cake sit at room temperature for about 20 minutes so the texture softens slightly.

If I want to enjoy it warm, I heat individual slices in the microwave for about 10 to 15 seconds. This makes the marshmallow topping soft and gooey again.

FAQs

Can I use regular crackers instead of graham crackers?

I can substitute digestive biscuits or similar sweet crackers if graham crackers are unavailable.

Can I make this cake ahead of time?

I often bake the cake a day ahead and add the marshmallow fluff and ganache before serving.

How do I know when the cake is fully baked?

I check the center with a toothpick. If it comes out clean or with a few crumbs, the cake is ready.

Can I freeze S’mores Cake?

I freeze the unfrosted cake tightly wrapped for up to 2 months. I add the toppings after thawing.

What type of chocolate works best for the ganache?

I prefer dark chocolate because it balances the sweetness of the marshmallow fluff.

Can I make this cake without buttermilk?

I sometimes use regular milk mixed with a little lemon juice or vinegar as a substitute.

How should I crush the graham crackers?

I use a food processor for fine crumbs, but a sealed bag and rolling pin work well too.

Can I toast the marshmallow topping?

I love lightly toasting the marshmallow fluff with a kitchen torch for a classic campfire flavor.

What size baking pan should I use?

I use a 9×13 inch baking pan for the best thickness and even baking.

Can I turn this recipe into cupcakes?

I can divide the batter into cupcake liners and reduce the baking time to about 18–20 minutes.

Conclusion

S’mores Cake is one of my favorite desserts when I want something comforting, chocolatey, and memorable. The combination of rich cocoa flavor, buttery graham crackers, fluffy marshmallow topping, and silky chocolate ganache creates a dessert that feels both nostalgic and indulgent. Whether I make it for a special gathering or simply to satisfy a sweet craving, this cake always becomes a standout treat everyone enjoys.