Decadent Chocolate Tiramisu Mousse Layer Cake

I had a birthday cake to make and knew I wanted a tiramisu-flavoured cake, and after a lot of doom scrolling, which we will call “research,” I happened to find a super cool version made by recipe creator Sophie Mann (https://www.instagram.com/mannsgotmunch), which I then adapted to fit my vision and my flavour profile.

Soooo if you love classic Italian tiramisu and rich chocolate cake, this Chocolate Tiramisu Cake is the indulgent dessert mashup you’ve been waiting for. Featuring a moist chocolate espresso sponge, luscious dark chocolate mousse filling, and silky mascarpone Chantilly cream, this layered masterpiece is bold, elegant, and irresistibly decadent.

Perfect for dinner parties, birthdays, or holiday entertaining, this espresso chocolate cake delivers deep cocoa flavor, creamy texture, and that signature tiramisu coffee kick in every bite.

Why You’ll Love This Chocolate Tiramisu Mousse Cake

Ultra-moist chocolate espresso sponge cake
Light yet rich dark chocolate mousse filling
Silky, flowing mascarpone Chantilly cream
Intense coffee flavor from a strong espresso soak
Stunning bakery-style finish with cocoa dusting and gold dust

If you’re searching for the best chocolate tiramisu cake recipe, this is it.

Ingredients Breakdown

For the Chocolate Espresso Cake

This sponge is incredibly moist thanks to olive oil, crème fraîche, and hot espresso.

You’ll need:

320g plain flour, sifted
120g cocoa powder, sifted
185g white sugar
1 tsp fine sea salt
1.5 tsp baking powder
2.5 tsp bicarbonate of soda
1.5 tsp vanilla extract
200g crème fraîche (32% fat), room temperature
3 eggs, room temperature
215ml olive oil
215ml strong hot espresso

Why Hot Espresso?

Hot coffee blooms the cocoa powder, intensifying the chocolate flavor and creating that deep, luxurious taste associated with traditional tiramisu.

For the Dark Chocolate Mousse Filling

This whipped ganache-style mousse is rich but airy.

225g dark chocolate (70%), chopped
300ml whipping/double cream (40% fat)
3 heaped tbsp dark muscovado sugar

This filling adds intense chocolate flavor and balances beautifully with the coffee-soaked sponge.

For the Mascarpone Chantilly Cream

Inspired by classic tiramisu cream, this version is lighter and silkier.

250g mascarpone
500ml whipping/double cream (40% fat)
1 tsp vanilla extract
1/4 cup icing sugar (adjust to taste)

Whipped to soft peaks, it creates that elegant, flowing tiramisu-style finish.

For the Espresso Soak & Finish

100ml strong espresso
2 tsp dark muscovado sugar
Cocoa powder for dusting
Gold dust (optional but stunning)

Step-by-Step: How to Make Chocolate Tiramisu Cake

1. Bake the Moist Chocolate Espresso Sponge

Preheat oven to 180°C (350°F).
Grease and line two 9-inch cake tins.
Whisk dry ingredients together (sugar, sifted cocoa, sifted flour, salt, baking powder, bicarbonate).
In another bowl, whisk eggs, crème fraîche, vanilla, and olive oil.
Fold dry ingredients into wet in two batches.
Slowly whisk in hot espresso
Divide between tins and bake for 35 minutes.
Cool completely before assembling.

Note: The batter won’t be very runny, nor will it be too wet. It will flow like proper cake batter.

2. Make the Chocolate Mousse Filling

Heat cream and muscovado sugar until steaming (not boiling).
Pour over chopped dark chocolate.
Let sit 2 minutes, then stir until smooth and glossy.
Chill 1 hour until thickened.
Whisk 1–2 minutes until fluffy and spreadable.

⚠️ Watch carefully — over-whisking can make it grainy.

3. Prepare the Mascarpone Chantilly Cream

Beat the mascarpone with half the icing sugar. Not for too long, as the mascarpone can split.
Add cold whipping cream, vanilla, and remaining sugar.
Whisk to soft peaks for a classic, flowing tiramisu texture.

For a more stable frosting, whisk to medium peaks.

Assembly Guide for a Bakery-Style Finish

Level cake layers.
Dissolve sugar into warm espresso.
Brush half the soak over the first layer.
Spread the entire chocolate mousse evenly.
Add a second layer and brush the remaining soak.
Pour mascarpone Chantilly over the top, letting it drip naturally.
Finish with cocoa dusting and gold dust.

Serve extra mascarpone cream on the side.

Expert Tips for the Best Chocolate Tiramisu Cake

The Room Temperature Rule

Cold dairy won’t emulsify properly. Room temp eggs, mascarpone, and crème fraîche are essential.

Sifting Is Not Optional

Sift cocoa and flour for a professional, velvety crumb.

The Secret to the “Flowing” Tiramisu Look

Whip mascarpone cream only to soft peaks for that elegant drizzle effect.

Use Quality Espresso

A strong espresso machine shot or Moka pot brew, gives the most authentic tiramisu flavor. No machine? Mix 100ml boiling water with 2 tbsp quality instant espresso powder.

Storage & Make-Ahead Tips

Store refrigerated due to fresh cream and mascarpone.
Remove from fridge 20–30 minutes before serving for the best texture.
Sponge layers can be baked a day ahead and wrapped tightly with plastic wrap.

Frequently Asked Questions

Can I make this chocolate tiramisu cake ahead of time?

Yes! Ensure it’s wrapped and airtight. You can make the components earlier and assemble them on the day of.

Can I freeze a chocolate tiramisu cake?

You can freeze the sponge layers before assembly. Ensure it’s tightly wrapped with plastic wrap to avoid drying out. However, the mascarpone cream and mousse are best made fresh.

What can I use instead of espresso?

Strong-brewed coffee or instant espresso powder mixed with boiling water works well. The key is a bold coffee flavor.

How do I prevent lumpy mascarpone cream?

Always use room temperature mascarpone and start whisking it alone before adding cream.

Can I turn this into cupcakes?

Absolutely. Bake in lined cupcake tins for 18–22 minutes and core the center to fill with chocolate mousse.

Final Thoughts

This Chocolate Tiramisu Cake combines everything we love about tiramisu — espresso, mascarpone, cocoa — with the indulgence of a rich chocolate layer cake. It’s bold, elegant, and guaranteed to impress.

If you’re searching for a show-stopping chocolate espresso dessert, this is the one to bake next.

Try my other desserts

Tiramisu Chocolate Cake with Mascarpone Chantilly

Course: DessertDifficulty: Medium

Servings

servings

Prep time

minutes

Cooking time

minutes

Total time

hours

A rich, cocoa-forward coffee sponge balanced with a muscovado-chocolate mousse and flowing mascarpone chantilly.

Ingredients

The Chocolate Espresso Cake:
320g Plain Flour, sifted
120g Cocoa Powder, sifted
185g White Sugar
1 tsp Fine Sea Salt
1.5 tsp Baking Powder
2.5 tsp Bicarbonate of Soda / Baking Soda
200g Creme Fraiche (32% fat, room temperature)
3 Eggs (room temperature)
1.5 tsp Vanilla Extract
215ml Olive Oil
215ml Strong Hot Espresso
The Mousse Filling:
225g Good Quality Dark Chocolate (70%), chopped
300ml Whipping / Double Cream (40% fat)
3 heaped tbsp Dark Muscovado Brown Sugar
The Mascarpone Chantilly Cream:
250g Mascarpone
500ml Whipping / Double Cream (40% fat)
1 tsp Vanilla Extract (or 1/2 tsp vanilla powder)
1/4 cup Icing Sugar (adjust to taste)
The Soak & Finish:
100ml Strong Espresso
2 tsp Dark Muscovado Sugar
To Finish: Cocoa powder and gold dust

Directions

Preparation
Preheat your oven to 180°C (350°F) on the bake setting.
Grease and line two 9-inch cake tins with parchment paper and butter.
Ensure your eggs, mascarpone, and creme fraiche are at room temperature for the best emulsion.
Bake the Sponge
In a large mixing bowl, whisk together the dry ingredients: sugar, sifted cocoa, sifted flour, salt, baking powder, and bicarbonate of soda.
In a separate bowl, whisk the eggs, creme fraiche, vanilla, and olive oil until smooth and well incorporated.
Gradually add the dry ingredients into the wet mixture in two batches, folding gently to ensure a smooth batter. Don’t overmix.
Slowly whisk in the hot espresso until the batter is glossy.
Divide the batter evenly between the tins. Bake for 35 minutes (or until a toothpick inserted in the center comes out clean).
Allow the cakes to cool completely before assembling.
Tip: If assembling later, cover tightly with plastic wrap to avoid drying out
Create the Chocolate Mousse
In a small saucepan, heat the cream with the muscovado sugar until steaming (NOT BOILING) and the sugar is fully dissolved.
Pour the hot mixture over the chopped dark chocolate.
Let it sit for 2 minutes, then stir until glossy and smooth.
Cover with plastic wrap, ensuring the wrap touches the surface of the ganache to prevent a skin from forming.
Let it cool at room temperature for 15 minutes, then chill in the fridge for 1 hour until completely cool and thickened.
Using an electric whisk, whisk for 1–2 minutes until it lightens in color and forms a fluffy, spreadable mousse. Do not over-whisk.
Keep chilled until assembly.
Prepare the Mascarpone Chantilly
Beat the mascarpone with half of the icing sugar until softened.
Slowly pour in the chilled cream, vanilla, and the remaining icing sugar.
Whisk until it forms soft peaks for a classic, flowing tiramisu texture. (If you prefer a stable frosting, whisk to medium peaks.) Keep chilled until assembly.
Assembly
Level the cooled cakes with a serrated knife to remove any “doming.”
Dissolve the 2 tsp muscovado sugar into the warm espresso to create the soak.
Place the first cake layer on your serving plate.
Brush generously with half of the espresso soak.
Spread the entire batch of chocolate mousse evenly over the layer.
Place the second cake layer on top and brush with the remaining espresso soak.
Pour about half of the Mascarpone Chantilly over the top, allowing it to drizzle naturally over the edges.
Finish with a heavy dusting of cocoa powder and a sprinkle of gold dust.
Serve with the remaining Mascarpone Chantilly on the side.

Notes

The “Room Temp” Rule: Ensure your eggs, mascarpone, and crème fraîche are at room temperature before you start. Cold dairy doesn’t emulsify well with oil and coffee, and cold mascarpone is the #1 cause of lumpy frosting.
Whisking the Mousse: When whisking the chilled ganache into a mousse, watch it like a hawk. Because of the high fat content (40% cream + cocoa butter), it can go from “soft and fluffy” to “over-beaten and grainy” in just 15 seconds. Stop as soon as it holds its shape.
The Secret to the “Flowing” Look: To get that beautiful, bougie drizzle seen in the photos, only whip your Mascarpone Chantilly to soft peaks. It should be thick enough to hold a slight shape but loose enough to slowly “self-level” and drip down the sides of the cake.
Sifting is Essential: Cocoa powder and flour are notorious for lumps. For a professional, velvety crumb, always sift your dry ingredients together before adding the wet mixture.
The Espresso Soak: For the best flavor, use high-quality espresso or a very strong stove-top Moka pot coffee. If you don’t have an espresso machine, you can use 75ml of boiling water mixed with 2 tablespoons of high-quality instant espresso powder.
Storage: Because of the fresh cream and mascarpone, this cake must be stored in the fridge. However, for the best texture, take it out about 20–30 minutes before serving so the chocolate mousse can soften slightly.

The Ultimate Chocolate Tiramisu Cake Recipe