Easy Smores Cake

This easy Smores Cake has ribbons of marshmallow, graham cracker, and chocolate in a rich fudge cake. Get that irresistible s'mores flavor in every bite!

piece of s'mores cake on a plate in front of a baking dish.

Why You'll Love S'mores Cake

It's everything you love about the summer treat, just in a cake!

In every bite of Smores Cake, you're going to get a little taste of each element of a classic S'mores. Marshmallow creme, chocolate, and graham crackers are swirled throughout a rich chocolate cake base.

Then, the top cake layer has chocolate marshmallow creme and graham cracker crumble, making for an awesome texture and flavor combo. It's a sweet, rich cake that combines light marshmallows and rich chocolate for a to-die-for summer cake recipe.

This cake is special enough to be a birthday cake but simple enough to make for a weekend dessert. It's one of those great fake-out recipes that looks complicated but is so simple to whip up.

Smore Cake Ingredients & Substitutions

ingredients for s'mores cake.

(See recipe card at the bottom of the post for ingredient measurements.)

  • Fudge Cake Mix - Now there are several different chocolate cake mixes out there. I chose fudge because it's going to be a little bit richer and denser. I didn't quite want the thickness of brownies, so I went with cake mix - that being said, brownie mix would be delicious too!
  • eggs
  • butter
  • milk
  • vanilla extract
  • chocolate frosting - The jarred stuff is just fine. You can also mix 2 sticks of softened butter, 3 cups of powdered sugar, and ½ cup cocoa powder (adding milk to thin as needed).
  • marshmallow creme
  • jumbo marshmallows - you'll need jumbo (as opposed to mini marshmallows) so they don't completely melt during baking. The jumbo variety leave a little bit of toasted marshmallow behind in the cake.
  • chocolate bar - I recommend the kind that's made to break into small chunks.
  • graham crackers

Cake Additions

The name of the game here was easy; I wanted to make this as simple as possible to make. However, there are a few elements you could add to up the wow factor on your Smores Cake.

  • I almost added a layer of chocolate ganache below the chocolate marshmallow cream topping to give it even more depth, but I ultimately cut it to make the cake as simple as possible. If you'd like to add that, just use the Chocolate Ganache topping from my Graham Cracker Eclair Cake recipe and pour over the cake 30 minutes before adding marshmallow creme to the top.
  • You could add a graham cracker crust to the bottom of the cake pan, below your swirly cake layer. Just follow the graham cracker crust instructions from my Banana Split Cake.

Hey, chocolate fans. 🍫 Check out my Dipping Chocolate and Cake Pops with Oreo Cookies recipes, too!

Step-by-Step Instructions

Step 1: Make the Chocolate cake mix base.

chocolate cake batter in a glass baking dish.

In a large bowl, whisk together cake mix, eggs, butter, vanilla extract, and milk with a hand mixer on medium speed. Pour in the bottom of a 9x13" glass dish prepared with cooking spray.

Step 2: Swirl in chocolate & marshmallow.

swirling marshmallow fluff and chocolate frosting into a cake batter.

Spoon one of the tubs of marshmallow fluff and the tub of chocolate frosting over the cake mix. With a spoon, gently swirl the two together. You don't want to completely stir; you should still see separate swirls of marshmallow, frosting, and cake batter.

Make sure you swirl the mixture to the end of the pan.

Step 3: Add more chocolate, marshmallows, and graham crackers.

marshmallows, graham crackers, and chocolate bars pressed into cake batter mixture.

Sprinkle mini marshmallows, graham cracker chunks, and chocolate bar pieces over the top of the swirl mixture and gently press in.

Step 4: Bake the S'mores cake.

smores cake after baking.

Bake mixture at 350 degrees for 35-40 minutes, until the center of the cake is not jiggly. Let cool for 15-20 minutes.

Note: The cake rises a lot during baking. Don't worry - it will settle back down as it cools.

Step 5: Top cake with Chocolate marshmallow Fluff and graham cracker crumble.

spreading chocolate marshmallow fluff on smores cake.

Mix together remaining marshmallow fluff and chocolate frosting, not totally blending so there are still swirls throughout. Frost cake with this mixture.

spreading graham cracker crumble on top of the cake.

Crush the remaining graham crackers into fine crumbs. Mix with 2 tablespoons of butter. Sprinkle these graham cracker crumbs over the top of the frosting.

Serve warm.

Leftover Storage

This cake should be enjoyed within 2-3 days of preparation. Just cover the cake pan with plastic wrap or aluminum foil.

This cake can also be frozen. Omit the graham cracker crumbs on top of the cake and freeze in an airtight container for up to 6 months. After thawing in the refrigerator, add graham cracker crumbs to the top of the cake.

smores cake in a baking dish with a serving utensil; piece of cake on a plate next to it, with graham cracker, chocolate, and marshmallows spread on counter.

Recipe Tips and Tricks

  • This is a dish best served warm. It's delicious the next day, but there's just something about that ooey-gooey marshmallow and melted chocolate right out of the oven. Pop a slice in the microwave for 15-20 seconds for a warm, gooey, chocolatey treat!
  • If you have a kitchen torch on hand, you can toast the marshmallow fluff on top of the cake before adding the graham cracker crumbs. This will give the cake even more flavor depth.

Smores Cake FAQs

Yes, this is perfectly fine to make up to a day in advance. I would wait until just before serving to add the graham cracker crumble to the top of the cake.

Once your Smores Cake is topped with marshmallow fluff, you can place cake under the oven broiler for 2-3 minutes. This marshmallow topping can burn easily; watch it carefully!

You don't! If you prefer making from scratch and have a yummy chocolate cake recipe of your own, use that instead. The boxed cake mix is just much easier.

Let me see those yummy Smores Cakes! 🍫 Tag me on social media (@lambertslately) with your cake creations. You can also let me know what you think by rating ⭐️ or commenting below!

xo, Leslie - signature at the end of blog post.
piece of s'mores cake on a plate in front of a baking dish.

Smores Cake

This easy Smores Cake has ribbons of marshmallow, graham cracker, and chocolate in a rich fudge cake. Get that irresistible s'mores flavor in every bite
4.98 from 40 votes

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Prep Time 30 minutes
Cook Time 40 minutes
Total Time 1 hour 10 minutes
Course Dessert
Cuisine American
Servings 16
Calories 562 kcal

Ingredients
  

  • 1 box fudge cake mix
  • 3 eggs
  • 1 stick butter softened
  • 1 cup milk
  • 2 teaspoons vanilla extract
  • 13 oz marshmallow fluff
  • 16 oz chocolate frosting
  • 3 cups jumbo marshmallows
  • 4 oz chocolate bar broken into pieces
  • 2 tablespoon butter melted
  • 1 sleeve graham crackers half broken into chunks; half into crumbs

Instructions
 

  • In a large bowl, mix together cake mix, 3 eggs, 1 stick of butter, 2 teaspoon vanilla extract, and 1 cup of milk. Spread in the bottom of a greased 9x13" glass dish.
  • Spoon half of the marshmallow fluff and half of the tub of chocolate frosting over the cake mix. With a spoon, gently swirl the two into the batter. You don't want to mix; you should still see separate swirls of marshmallow fluff, frosting, and cake batter. Make sure you swirl the mixture to the end of the pan.
  • Sprinkle jumbo marshmallows, graham cracker chunks, and chocolate bar pieces over the top of the swirl mixture and gently press in.
  • Bake mixture at 350 degrees for 35-40 minutes, until the center of the cake is not jiggly. Let cool for 15-20 minutes.
  • Mix together remaining marshmallow fluff and chocolate frosting, not totally blending so there are still swirls throughout. Frost cake with this mixture.
  • Crush the remaining graham crackers into fine crumbs. Mix with 2 tablespoons of butter. Sprinkle these graham cracker crumbs over the top of the frosting.
  • Serve warm.

Nutrition Facts

Calories: 562kcalCarbohydrates: 98gProtein: 5gFat: 20gSaturated Fat: 9gPolyunsaturated Fat: 3gMonounsaturated Fat: 7gTrans Fat: 0.3gCholesterol: 51mgSodium: 386mgPotassium: 205mgFiber: 1gSugar: 71gVitamin A: 291IUCalcium: 71mgIron: 2mg
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6 Comments

  1. Atim at EffiFit says:

    Holey moley! This looks amazing! Thanks for sharing on the Totally Terrific Tuesday link party!

  2. Elizabeth @ Guilty Chocoholic Mama says:

    Thank GOODNESS I clicked over here from #WonderfulWednesday, because I cannot even begin to tell you now much I need this cake in my life. Printed and pinned so fast my head is spinning. God bless you. 😉

  3. Amber Harrop says:

    5 stars
    This looks utterly delicous - I love marshmallow

  4. Oh my gosh, this sounds luscious! How did you ever come up with such a good and unique cake idea! Thank you so much for sharing it on Party in Your PJ's! Pinned and shared.

  5. 4 stars
    This looks really good. Not sure what planet I have been on because I have never heard of earthquake cakes. Yum.

  6. 5 stars
    Oh my!! So much yummy decadence I can feel the pounds coming on just by looking at all that yumminess.