Biscoff Mocha Sheet Cake with a Caramel Soak and Mocha Buttercream

An easy-to-make sheet cake with the warm and delicious flavor – perfect for fall! My new Biscoff Mocha Sheet Cake has Biscoff cake, a mocha flavored caramel soak, Biscoff cookie butter spread, Biscoff cookies, and a smooth and silky mocha buttercream.

Don’t use coffee for dietary or religious reasons? Don’t worry, I’ve got you! Be sure to read the post for coffee alternatives and substitutes.

An overhead view of a sheet cake on a cutting board.

My love for Biscoff runs deep! Ever since I made my original Biscoff Cake six years ago, Biscoff flavored cakes have been one of my favorite flavors to make. Biscoff, a cinnamon and nutmeg spiced biscuit cookie, is an incredibly versatile flavor and pairs with so many things.

Here’s a sample of what I’m talking about!

Recently I asked our community on Instagram what flavor they’d like me to pair with Biscoff next. The top pick: coffee/mocha.

Now, while I’m not a coffee drinker, I do love the flavor in baked goods. It’s just got this warm, rich, slightly bitter (not a bad thing) flavor dimension that complements flavors like chocolate, gingerbread, and caramel so well.

Since Biscoff has a similar flavor profile to gingerbread, I knew the combo of Biscoff and mocha would be a winner… and IT IS!

Person cutting a sheet cake.

Biscoff Mocha Sheet Cake

For my Biscoff Mocha Cake, I used my Biscoff cake recipe, along with a mocha flavored caramel, Biscoff spread, Biscoff cookies, and a mocha buttercream – all in a sheet cake! (By the way, how much do we love a sheet cake?! So simple!)

I think you’ll find this cake really easy to make. One thing I wanted to talk about before getting to the recipe are coffee flavoring options and substitutes.

Slice of sheet cake on a plate.

Coffee Flavoring Options & Substitutes

  1. Extracts and emulsions: extracts (alcohol based flavorings) and emulsions (water based flavorings) can be used interchangeably and are often found at the grocery store, online and specialty stores like Orson Gygi.
  2. Espresso powder: easily found at grocery stores – needs to be dissolved in warm cream before using.
  3. Pero: offers a coffee-like taste but is not made from coffee beans. Rather, Pero is naturally caffeine-free and blended from all-natural ingredients, including malted barley, barley, chicory, and rye. I’ve used this a ton and love it as a coffee substitute if you prefer not to use anything with coffee beans.

You will see amounts for each in the recipe.

Baker’s Note: Depending on your love of coffee flavoring, you can adjust the amount of extract, powder, or Pero you use. Start with 1-2 teaspoons and add more, as desired.

Sheet cake with piping design on top.

Note About the Mocha Caramel Soak

For the mocha caramel soak, make sure to note that we want this to be thinner than when we normally make caramel for our cakes. The consistency should be thin enough to soak into the cake. Also be sure to let the caramel cool to room temperature before using on the cake. This will make it easier to spread the Biscoff cookie butter on top.

How to Bake Moist Cakes

Don’t forget to follow my go-to tips for getting your cakes to rise and bake well:

  • First, preheat your oven for 30 minutes prior to baking.
  • Next, beat the butter and sugar for a few minutes on medium-high speed, until light and fluffy.
  • Use good quality pans like Fat Daddio.
  • Be sure to 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.

Hope you love this one as much as I do!

Slice of sheet cake on a plate.

Biscoff Mocha Sheet Cake

5 from 3 votes
Biscoff cake with a mocha flavored caramel soak, Biscoff cookie butter spread and mocha buttercream.



  • 18 Biscoff or Speculoos Cookies
  • 2 1/8 cups (255 g) all-purpose flour
  • 1 3/4 teaspoons (7 g) baking powder
  • 3/4 teaspoon (3 g) baking soda
  • 3/4 teaspoon (4.5 g) salt
  • 1 cup (226 g) unsalted butter, at room temperature
  • 1 cup (220 g) brown sugar, packed
  • 2/3 cup (133 g) granulated sugar
  • 4 eggs, at room temperature
  • 2 cups (480 g) buttermilk, at room temperature

For the Mocha Caramel

  • 1 cup (200 g) granulated sugar
  • 1/2 cup (120 g) water
  • 2 teaspoons (14 g) light corn syrup or honey
  • 1 cup (240 g) heavy whipping cream
  • 2-3 teaspoons (12 g) coffee extract or emulsion OR 2-3 teaspoons espresso powder (6 g) OR 3 teaspoons Pero for a non coffee substitute
  • 1 teaspoon (4.2 g) vanilla extract
  • 1 teaspoon (6 g) salt

For the Filling

  • 1 1/2 cups Biscoff cookie butter
  • 6 Biscoff cookies crushed into chunks


  • 2 cups (452 g unsalted butter, slightly cold
  • 6 cups (750 g) powdered sugar, measured and then sifted
  • 5 teaspoons (21 g) coffee extract or emulsion OR 5 teaspoons espresso powder (10 g) OR 5 teaspoons Pero for a non coffee substitute
  • 1/4 cup (57 g) heavy cream
  • Pinch of salt
  • ***If you would rather spread the buttercream on the cake with an offset spatula than pipe it, I would suggest doing half a batch of buttercream.



  • Preheat your oven to 325 degrees F. Spray your 9-inch by 13-inch cake pan with non-stick cooking spray, line the bottom with parchment and spray again. Set aside.
  • Place the Biscoff cookies in a food processor or blender and pulse until the cookies are finely ground and resemble sand.
  • In a medium-size bowl, combine the Biscoff crumbs, all-purpose flour, 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, brown sugar and granulated sugar on medium speed until light and fluffy. Add the eggs, one at a time, beating well after each addition.
  • Before adding the dry ingredients, continue to beat the wet ingredients for about 1 to 2 minutes on medium-high speed, until the mixture is 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 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 into the prepared pan. Bake for 35 to 40 minutes. Cool 15 to 20 minutes on a wire rack before inverting onto a cooling rack to cool completely.

For the Mocha Caramel

  • Heat the cream in the microwave for about a minute. If you’re using espresso powder or Pero, whisk in the powder until it dissolves. Set aside.
  • Combine the sugar, water, and corn syrup in a saucepan over medium heat. Stir until sugar is dissolved and then stop stirring.
  • You want the mixture to cook on its own. Stirring creates crystallization. If you notice sugar crystallizing on the sides of the pan, soak a pastry brush in warm water and run the brush along the sides of the pan where the sugar is building up.
  • Once the mixture turns amber in color, remove the pan from the heat and slowly add the cream, while stirring the caramel.
  • Add the vanilla and salt, and stir to combine. If you’re using coffee extra or emulsion, add it here as well.
  • Cool to room temperature before using. The caramel will thicken as it cools but should still be thin enough to act as a “soak.” If you need to thin it out more, heat another ¼ cup heavy whipping cream and add the caramel. Stir to combine. Let cool to room temperature again before using.


  • In the bowl of an electric mixer, fitted with the paddle attachment, beat the butter for about 2 to 3 minutes, until light and fluffy and pale in color.
  • With the mixer on slow, gradually add the powdered sugar, followed by the heavy cream, coffee emulsion, and pinch of salt.
  • IF YOU’RE USING ESPRESSO POWDER OR PERO, heat the cream slightly and whisk the espresso powder or Pero into the heavy cream. Add to the butter and powdered sugar mixture when the cream is at room temperature or cold again.
  • Once all of the ingredients are combined, turn the mixer to medium-high and beat for about 3 to 5 minutes.
  • Before using the buttercream, make sure to beat it by hand with a wooden spoon or large spatula to help push out the air pockets.


  • Once the cake has cooled to room temperature, use a fork to poke holes all over the cake.
  • Drizzle the caramel soak over the cake, using a pastry brush or the back of a spoon to spread it around, ensuring it soaks into the holes.
  • Using an offset icing spatula or the back of a spoon, spread the Biscoff cookie butter over the cake. If needed, heat the Biscoff spread slightly in the microwave to make it more spreadable.
  • Sprinkle on crushed Biscoff cookies and pat them into place gently.
  • Using the Wilton 6B piping tip, pipe the buttercream on the cake. Alternatively, use an offset icing spatula to spread on the buttercream.
Course Dessert
Keyword biscoff, Biscoff Cake, Biscoff Mocha, Biscoff Mocha Sheet Cake, Mocha buttercream, sheet cake

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. Chaundra-

      I just made this as a three layer. Instead of having a “soak” I made it into a thicker caramel. I then did a cake layer, 1/2 cup butter cream, piped a rim of buttercream, then filled it with 1/2 the cookie butter, Biscoff cookies, and drizzled the mocha caramel on top. Repeated the same with the next cake layer. I also drizzled the caramel on the very top of my cake.

  1. Hi this sounds incredible, But I want to make a 6 inch layer cake . Will this work ? Thank you I really enjoy all you recipes ,

  2. Question 1) I would like to freeze the completed cake if possible. Will that work with this cake? Just wondering if the caramel soak will still be moist and yummy once thawed?

    Question 2) I am making sheet cakes for an upcoming wedding to supplement wedding cake. I am using 12×18 pans. Can I just double this for that size pan?

    Thanks so much!! You are the BEST!!

  3. Hi! I am wanting to make the cake part in advance and freeze it. Will I be able to defrost it and then poke the holes to do the soak?

  4. Hello, I was wondering how I should store this cake if I’m going to make it one day and serve it the next or possible 2 days after making it?