The Best Decadent and Delicious Biscoff S’mores Cake from Scratch

Biscoff S’mores Cake – dive into chocolate Biscoff cake, baked on Biscoff crust, marshmallow filling and Biscoff buttercream.

Cake on a cake stand.

As many of you know by now, my love of Biscoff runs DEEP! It hasn’t taken over my obsession for peanut butter, but it’s a close second. The flavor is just so rich and warm and delicious. Plus, it is proving to pair with so many flavors! Check out how I’ve used Biscoff in the past:

Biscoff S’mores Cake

Another one of my favorite flavors is s’mores! Graham crackers, chocolate and marshmallows – what’s not to love?! After several requests to combine these two favorite flavors of mine, I bring to you my new Biscoff S’mores Cake with layers of Biscoff cookie crust, chocolate Biscoff cake, toasted marshmallow filling, chocolate ganache and Biscoff buttercream.

Top view of a cake with swirls and cookies.

Chocolate Biscoff Cake

To make the chocolate Biscoff cake layer, we’re using my Biscoff cake recipe with the addition of cocoa powder.

Quick note about cocoa powder…

The type of cocoa you use in your cakes will make a world of difference in flavor and texture. I recommend Extra Brute Cacao Barry Cocoa Powder. This cocoa powder is a high quality, rich-in-flavor, high fat cocoa powder. All of those qualities great enhance the flavor and texture of your cake.

Steps for making chocolate Biscoff cake:
  • Beat the butter and sugars on medium-high speed for about three minutes to ensure the texture is smooth and fluffy. The sugar should mostly be dissolved and the color of the mixture should look lighter in color.
  • Gradually add the eggs, mixing well between each addition. After all of the eggs are added, be sure to mix the batter on medium-high speed until the batter is smooth and all of the ingredients have come together. If the batter looks chunky or curdled at this point, it’s likely your wet ingredients were too cold or you didn’t mix long enough.
  • Alternately add the flour mixture (which includes the Biscoff cookie crumbs and cocoa powder) and the buttermilk, starting and ending with the flour mixture.
  • You’ll then pour the batter onto the Biscoff cookie crust and bake the cakes at 325 degrees F for about 30 to 35 minutes, or until a toothpick inserted in the center of the cake comes out with a few moist crumbs on it.

How to Make Moist Cake Layers From Scratch

Don’t forget to follow my go-to tips for getting your chocolate Biscoff cake layers to rise and bake well:

  • Preheat your oven for 30 minutes prior to baking.
  • Use good quality pans like Fat Daddio.
  • Spray your pans with nonstick spray and line with parchment paper. 
  • Don’t overmix your cake batter once you add the dry ingredients.
  • Use room temperature wet ingredients.
  • Use fresh baking powder.
  • Bake until a toothpick inserted in the center of the cake comes out with a few moist crumbs on it.

How to Schedule Baking the Biscoff S’mores Cake

Don’t let all the elements of this cake scare you away! Every minute in the kitchen is worth every bite you take. Promise!

Here’s how I schedule baking the Biscoff S’mores Cake:

  • Day 1: make the crust and cake layers (once cooled to room temperature, cover with plastic wrap and freeze)
  • Day 2: make the marshmallow filling and buttercream (store each in airtight containers in the refrigerator and bring back to room temperature before assembly)
  • Day 3: make ganache and then assemble
Cake on a cake stand.

Biscoff S’mores Cake

Chocolate Biscoff cake baked on Biscoff cookie crust, filled with toasted marshmallow fillings, chocolate ganache, and Biscoff buttercream.
5 from 3 votes
Course Dessert
Cuisine Cake

Ingredients
  

FOR THE COOKIE CRUST

  • 24 (192 g) Biscoff cookies, finely ground
  • 1/2 cup (113 g) unsalted butter, melted
  • 1/3 cup (67 g) granulated sugar

FOR THE CAKE

  • 18 (142 g) Biscoff cookies, finely ground
  • 2 cups (240 g) all-purpose flour
  • 1/2 cup (59 g) good quality dark cocoa powder
  • 1 3/4 teaspoons (7 g) baking powder
  • 3/4 teaspoon (3 g) baking soda
  • 1 teaspoon (6 g) salt
  • 1 cup (226 g) unsalted butter, at room temperature
  • 2/3 cup (133 g) granulated sugar
  • 1 cup (220 g) light brown sugar, packed
  • 4 eggs, at room temperature
  • 2 cups (480 g) buttermilk, at room temperature

FOR THE MARSHMALLOW FILLING

  • 24 large marshmallows
  • 1 cup (125 g) powdered sugar, measured and then sifted
  • 1 cup (226 g) unsalted butter at room temperature
  • 1/2 teaspoon (2.1 g) pure vanilla extract
  • 1 jar (200 g) marshmallow fluff

FOR THE GANACHE

  • 1 cup (180 g) semi-sweet or dark chocolate chips
  • 1/2 cup (115.5 g) whipping cream

FOR THE BUTTERCREAM

  • 5 cups (625 g) powdered sugar, measured then sifted
  • 1 1/2 cups (339 g) unsalted butter, slightly cold
  • 1 cup (250 g) Biscoff cookie spread, I used chunky this time
  • 1 tsp (4.2 g) vanilla extract
  • 1/4 cup (47.8 g) heavy whipping cream
  • Pinch of salt

Instructions
 

FOR THE COOKIE CRUST

  • Preheat your oven to 375 degrees F. Spray three 8-inch round cake pans with non-stick spray and then line with parchment. Spray again. Set aside.
  • In a medium sized bowl combine the Biscoff cookie crumbs, melted butter and sugar. Stir until all the crumbs are damped by the melted butter.
  • Divide evenly between the three pans (4 ounces in each) and press down firmly with your hand or the back of a measuring cup.
  • Bake for 5 minutes, until golden brown. Let cool while you make the cake batter.

FOR THE CAKE

  • Preheat your oven to 325 degrees F.
  • In a medium-size bowl, combine the Biscoff crumbs, all-purpose flour, cocoa powder, baking powder, baking soda, and salt. Whisk until the ingredients are well-blended. Set aside.
  • In the bowl of a stand mixer fitted the paddle attachment, beat the butter, granulated sugar and brown sugar on medium speed until light and fluffy, about 2 to 3 minutes.
  • Add the eggs, one at a time, beating well after each addition, making sure to scrape down the bowl between additions. Continue to beat the mixture for a few more minutes, until the mixture is smooth. It’s not done until it looks cohesive, meaning, it should not look curdled. We want it to be smooth.
  • With the mixer on low speed, add ⅓ of the dry ingredients and mix until combined. Slowly add half of the buttermilk and mix until incorporated. Continue alternating the flour mixture and buttermilk until it has all been incorporated. Scrape down the sides of the bowl and slowly mix for another 20-30 seconds.
  • Pour the batter onto the Biscoff crust in each pan (about 18 ounces in each) and bake for 30 to 35 minutes, or until a toothpick inserted in the center of the cake comes out with a few moist crumbs on it. Cool 10 minutes on a wire rack before inverting onto a cooling rack to cool completely.

FOR THE MARSHMALLOW FILLING

  • Place the marshmallows on a cookie sheet lined with parchment paper and sprayed with nonstick cooking spray. Place on the middle rack of the oven, and broil the marshmallows until golden brown on top, about 30-60 seconds. Keep your eye on them!
  • Remove the pan from the oven and gently turn the marshmallows over and broil them again until they are golden brown on the other side.
  • In the bowl of a stand mixer fitted with the paddle attachment, combine the butter and powdered sugar and beat on low until blended. Add the vanilla and mix on medium speed for about three minutes
  • With the mixer on low speed, add the marshmallow cream and (slightly cooled) toasted marshmallows, and mix for about one minute.

FOR THE GANACHE

  • In a microwave safe bowl, pour the cream over the chocolate chips and heat for about 45-60 seconds. Stir, and if needed, heat for another 30 seconds to melt the chocolate chips completely. Let cool to room temperature before using.

FOR THE BUTTERCREAM

  • In the bowl of electric mixer fitted with the paddle attachment, combine the butter and Biscoff spread. Beat on medium-high speed until smooth, about 45 seconds.
  • Add the powdered sugar to the bowl and mix in, slowly at first until incorporated, then increasing the mixer speed to high. Blend in the vanilla extract, salt and heavy whipping cream, and continue to whip on high speed until very fluffy, about 4-5 minutes, scraping down the sides of the bowl as needed.
  • Beat frosting by hand with a wooden spoon to get air bubbles out.

ASSEMBLY

  • Place the first cake layer, graham cracker side down, on a cake board.
  • Pipe a rim of buttercream around the edge of the cake and then spread about half of the marshmallow filling evenly across the cake. Drizzle with chocolate ganache.
  • Place the second cake layer, graham cracker side down, on top and follow the steps above.
  • The final cake layer should also be placed graham cracker side down. Cover the cake with a thin layer of buttercream around the entire cake. Freeze for 15 minutes.
  • Finish frosting the cake with the remaining buttercream.
Keyword biscoff, biscoff buttercream, Biscoff S’mores Cake, s’mores
Tried this recipe?Let us know how it was!

Courtney Rich

I’m a self-taught baker, obsessed with cake.

I long ago ditched box mixes in pursuit of melt-in-your-mouth, to-die-for flavor combinations, fillings and textures. I believe cake must be decadent, life-changing and worthy of celebration! And I believe anyone should be able to bake that kind of cake – and I’m here to teach you just that!

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  1. 5 stars
    I’m a fan of many of your cakes and this is right up there. I love Biscoff cookies, so I had to try this. It’s a hit with my son. Made it in one day, so it can be done.

  2. 5 stars
    I followed the recipe exactly and it turned out PERFECT! Everyone at the baby shower was raving about it! Can’t wait to make it again.