s'mores cake with slice taken out

You all know that I have an itsy bitsy obsession with marshmallow fluff, and this cake is pretty much the cake of my dreams. Anything s’mores flavored I am ALL over it. S’mores macarons, s’mores brownies, s’mores icebox cake…I mean I could eat this flavor combo for the rest of my life.  So it probably come as no surprise that we just had to make a S’mores cake.

DUH. I honestly can’t believe it took us this long to take all those flavors of an ooey gooey s’more into a layer cake. 

s'more cake slice with fork

What’s your favorite party of a s’more? The golden marshmallow? The melty chocolate? The crunchy graham? Well I love them ALL.

Best part about this cake? All three get to shine through in their own individual layer.

head on shot of s'mores cake with toasted marshmallows on top

What is a s’mores cake:

S’mores cake takes the three key components of any good s’more and makes each one into a decadent layer. In case you live under a rock, a s’more is made from toasted marshmallows, chocolate, and two graham crackers sandwiched together. It’s easily one of my favorite flavors combos. You’ll make three separate components and then assemble them.

And I’m going to break it all down for you.

  1. Chocolate Cake: We used our favorite chocolate cake recipe to make the fudgiest, most chocolatey cake we’ve ever had.
  2. Graham Cracker Crumble: You know that buttery goodness traditionally found as the base of a graham cracker? We adapted that into a crumble to sprinkle in between each layer of cake (PSA it is to die for).
  3. Marshmallow Buttercream: Made with marshmallow fluff stirred right into the frosting, this ultra fluffy frosting tastes exactly like a marshmallow

s'mores cake with chocolate cake, marshmallow frosting, and graham cracker crumble with a slice taken out

And damn IT. IS. GOOD.

s'more layer cake AKA fudgy chocolate cake with a marshmallow and graham filling, marshmallow frosting, chocolate ganache, and topped with toasted marshmallows.YUM.

How to assemble s’mores layer cake:

This recipe will make a 2 layer 8 inch cake or a 3 layer 6 inch cake like we made here!

Simply place your first layer on a cake stand and frost the top of it with marshmallow buttercream. Sprinkle with half of the graham cracker crumble. Next, place another layer on top and repeat the process.

Place the last cake layer on top and frost the top and sides of the cake. We topped ours with chocolate ganache and toasted marshmallows but you could do anything!

slice of s'mores cake with fork on a plate

The only thing that could possibly make this s’mores  layer cake better would be serving it with a scoop of Ben and Jerry’s S’mores ice cream.

I thought it was discontinued but a quick google search shows that it’s still in stores and my grocery store stopped selling it. So basically it’s just discontinued for me.

Slice of s’mores Cake

So if you see Ben or Jerry around, please let them know we need them to bring their S’mores ice cream back to my grocery store so that we can eat it with this cake.

That is all.



S’mores Cake

s'mores cake with slice taken out


for the cake

for the frosting

  • 1/2 cup unsalted butter, softened
  • 1 1/4 cups powdered sugar
  • 1/2 cup marshmallow fluff
  • 1 teaspoon vanilla extract
  • 1/4 teaspoon salt

for the graham cracker crumble

  • 2 tablespoons unsalted butter, melted
  • 2 tablespoons honey (or sugar!)
  • 1 cup graham cracker crumbs


  1. Prepare the chocolate cake according to directions, baking it in 3 6 inch rounds. Allow the cakes to cool completely before frosting.*
  2. While the cake cools make the frosting and graham cracker crumble. Place the softened butter in the bowl of a stand mixer fitted with the whisk attachment. Beat the butter until smooth. Add the powdered sugar, salt and vanilla and beat until combined. Add the marshmallow fluff and beat until fluffy, about 3 minutes.
  3. To make the graham cracker crumble combine the graham cracker crumbs, melted butter, and honey in a small bowl and stir to combine.
  4. Place one layer of the cake on cake stand or plate. Frost the top of the cake with the marshmallow frosting and sprinkle half of the graham cracker crumble on top. Repeat with the second layer. Frost the top of the third layer and the sides with an offset spatula.



I also love s’mores! I’ll make this cake as two 8in or 9in round layers and thickly frost it with the marshmallow fluff buttercream! So amazingly good!


I made this! It is delish! I just wish I had made a little more frosting and also wish the finishing touches like the drip chocolate and roasted marshmallows were a part of the directions but the pictures really helped!! Thank you

Sofi | Broma Bakery

We never think to include the how to’s on decorating because we assume people want to take their own creative freedom with it, but if you ever have any questions about the decoration we’re more than happy to answer them 🙂

Happy you enjoyed this recipe!


If you are into Marshmallow Fluff, have you considered a Fluffernutter Pie? SO GOOD!!!

Sofi | Broma Bakery

Oh my. No! We must try it out! Thank you for the suggestion. Stay tuned 🙂

Ellen Manalo

I’m dying to make this but we don’ have marshmallow fluff in the Philippines only the regular ones….

Sofi | Broma Bakery

Hey Ellen! You could make your own by melting down 2 1/2 cups of marshmallows with 1 tablespoon corn syrup or honey!


OMG I cannot wait to make this!!


I made this recipe in half (love doing this so I don’t have too much cake for my family of 3). SO good. I didn’t have all of the exact ingredients (dark cocoa powder.. oops sorry) but it’s still fantastic! Thank you for the recipe.

Sofi | Broma Bakery

So glad you and your little fam enjoyed this! We think it’s pretty spectacular too 🙂


This cake was to die for! Thanks for sharing!


Please can you share how to make that lovely chocolate ganache running off the top of the cake?? I want to make this for my daughter’s 1st birthday party 🙂

Toni Martin

What is the chocolate drizzle on top?

Sofi | Broma Bakery

We just made a simple chocolate ganache!


Made this cake for Thanksgiving and everyone loved it! It was moist and very delicious. I added more marshmallow fluff to frosting. Also tried to replicate your version of cake with chocolate ganache, crumbs and roasted marshmallows. Looked spectacular! Thanks!

Sofi | Broma Bakery

YAY! We’re so incredibly happy that you enjoyed this s’mores cake. It’s pretty much my favorite recipe ever 🙂

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