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Double Chocolate Mousse Cake

by Nick Makrides
Chocolate Mousse Cake with slice taken out

Ever wondered what eating chocolate air is light? If biting into the lightest and fluffiest chocolate mousse cake is something you’ve always wanted to experience, then this double chocolate mousse cake recipe is just for you!

My perfectly light double chocolate mousse cake starts off with a chocolate brownie base that is topped with the lightest and most splendid mousse you’ve ever had. Slicing into this cake is so satisfying, eating it is simply divine!

Chocolate Mousse Cake slice on a plate

My favorite thing…

My favorite thing about this Double Chocolate Mousse cake? The Mousse! It’s so light and airy! You can’t see it in the video but it felt so satisfying slicing through it. The trick is to warm up your knife first which gives you nice clean slices!

What does the mousse cake taste like?

Well, chocolate, right? Duh Nick? But let’s talk about the texture. The texture of the brownie base is fudgy. It’s really chocolatey too. The mousse is really light, it’s very creamy and not too sweet.

Chocolate Mousse Cake close up with slice taken out

What happens if I don’t have gelatine leaves?

Well, you can use powdered gelatin. This recipe calls for 2 gelatin leaves. If using powder, you’ll need 2 tsp. To prepare the gelatine powder, simply add to a mixing bowl with 3 tsp of water and stir using a fork. Set aside to bloom (soak in the water) for 5 minutes then add to the hot milk and stir until melted.

What you need for the Double Chocolate Mousse Cake

Brownie Base

Unsalted butter – I used unsalted here. But you may use salted if you want some salt in the recipe. It will help break the sweetness a little.

Dark chocolate – I used nestle cooking melts.

Brown sugar – you can use caster sugar in it’s place if you wish. The brown sugar adds a richer flavor.

Eggs – I used large eggs

All-purpose flour – regular all purpose flour.

Mousse

Milk and dark cooking chocolate – a combination of both helps make this a smooth chocolate flavor. For a less sweet and more intense chocolate flavor, replace the milk chocolate with dark chocolate.

Gelatin leaves – see my notes above on this. But I used gelatin leaves for this recipe because it’s preferable. But you can use powdered gelatin if you wish.

Heavy whipping cream – Use cream with at least 30% fat content. This is the cream you use for whipping.

Caster sugar – This sugar is best for this recipe because it will dissolve in the meringue much quicker than granulated sugar.

How to make the mousse cake

Brownie Base

Chocolate Mousse Cake Instructional Image 01

1. Fill a pot a quarter of the way with water and bring to a gentle boil.

2. Add the butter, chocolate, and brown sugar

Chocolate Mousse Cake Instructional Image 02

3. Stir until melted.

4. Take off the heat and add the eggs. Whisk to combine.

Chocolate Mousse Cake Instructional Image 03

5. Add the flour and whisk until the batter is smooth.

6. Add to a springform pan lined with baking paper and bake for 20 minutes on 180°C / 350°F.

Chocolate Mousse Cake Instructional Image 04

7. Once baked and cooled, carefully run a knife around the sides of the brownie to loosen.

8. Take out of the pan. Spray the side with oil spray.

Chocolate Mousse Cake Instructional Image 05

9. Add acetate measuring 65cm (26-inches) in length on the inside.

10. Add the brownie back in the pan and set aside.

MousseChocolate Mousse Cake Instructional Image 061. Add the milk and dark chocolate to a heatproof bowl over a double boiler. Stir until melted and smooth.

2. Take off the heat and add the 6 egg yolks. Stir using a spatula until well combined. Set aside

Chocolate Mousse Cake Instructional Image 073. Add the gelatin leaves to a bowl of cold water. Allow to soak for 5 minutes.

4. Take out and squeeze out excess water.

Chocolate Mousse Cake Instructional Image 085. Transfer to a jug of hot cream (1 cup – 250ml) and stir until melted.

6. Add the hot gelatin cream to the chocolate mixture and stir until thinned out and smooth. Set aside.

Chocolate Mousse Cake Instructional Image 097. Add the remaining 2 1/2 cups – 625ml of cream to a mixing bowl with the vanilla extract and whip to stiff peaks.

8. Add the 6 egg whites to a separate large bowl that is very clean. With clean beaters, whip to soft peaks.

Chocolate Mousse Cake Instructional Image 109. Slowly add the sugar while mixing on high speed. Once all the sugar is in there continue mixing for 2 minutes until thick and glossy.

10. Add the cream to the chocolate mixture and use a spatula to fold through.

Chocolate Mousse Cake Instructional Image 1111. Add the meringue to the chocolate mixture and gently fold through with the spatula.

12. Pour the mousse mixture to the prepared springform pan.

Chocolate Mousse Cake Instructional Image 12

13. Use a spatula to flatten out the top and chill in the fridge for 4 hours or overnight.

Let’s unwrap this thing!

Chocolate Mousse Cake Instructional Image 13Let’s Decorate!

1. Firstly, run a hot and dry knife around the top of the mousse cake.

2. Unclip the springform pan and take away the sides.

Chocolate Mousse Cake Instructional Image 143. Use a warm cloth to run around the mouse section of the cake to help the mousse come away from the acetate easier.

4. Gently unwrap the mousse cake from the acetate and transfer to a serving plate. Slice using a warm knife to serve.

Tips for making Double Chocolate Mousse Cake

  • When slicing through the mousse cake, warm up your knife first by running it under hot water and drying it with a towel. It’ll give you those really clean straight slices that elevates the presentation of this cake!
  • Use a warm cloth to wipe the side of the set mousse cake before unwrapping. This will help the mousse come away from the acetate without tearing.

Other Recipes You Might Like!

Chocolate Cake

Chocolate Ganache Frosting

Greek Frape Cupcakes

Candy Apple Cupcakes

Flourless Chocolate Cake

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I hope you guys enjoyed this simple but delicious recipe with me. Please comment in the comments section below, or feel free to share with your family and friends on social media. I’ll see you all on the following recipe. Happy baking!

N x

Chocolate Mousse Cake slice standing up

Chocolate Mousse Cake with slice taken out

Double Chocolate Mousse Cake

Serves 12

4.5 from 10 votes
Prep Time: 20 mins
20 mins
Total Time: 3 hrs 45 mins
Course: Dessert
Cuisine: American

Ingredients

Brownie Base

  • 1/2 cup unsalted butter (+ 1 tbsp of butter)
  • 3/4 cup dark cooking chocolate
  • 3/4 cup brown sugar
  • 2 egss
  • 1/3 cup all-purpose flour

Mousse

  • 2 cups milk cooking chocolate
  • 2 cups dark cooking chocolate
  • 6 eggs
  • 2 gelatine leaves
  • 3 1/2 cups heavy cream
  • 1 tsp vanilla extract
  • 1/2 cup caster sugar


Instructions

Brownie Base

  • Preheat your oven to 180°C / 350°F. Spray an 8-inch springform pan with oil spray and line the bottom with baking paper.
  • Fill a pot about a quarter of the way with water. Bring to a gentle boil. Place a heatproof bowl on top and add the butter, chocolate, and brown sugar. Stir until all the ingredients have melted. Take off the heat and add the eggs, whisk to combine. Add the flour and whisk until the batter is smooth.
  • Add to the springform pan and bake for 20 minutes. Once baked, allow to cool completely at room temperature. Carefully run a knife around the edge of the brownie to loosen from the springform pan. Clean the inside of the springform pan. Place a piece of baking paper on bottom and place the sides on top. Clip to tighten.
  • Spray the side of the pan with oil spray and place a large piece of acetate measuring 65cm (26-inches) in length on the inside. The oil will help it stick to the pan. Place the cooled brownie in the pan and set aside.

Mousse

  • Add the milk and dark chocolate in a heatproof bowl over a double boiler. Stir until melted.
  • Take off the heat and add the egg yolks. Mix using a spatula. The mixture will instantly thicken and become almost dough like. Set aside.
  • Add gelatine leaves to cold water to soak for 5 minutes. Take out and squeeze out excess water. Place in a jug with 1 cup of the cream which has been heated. Stir until gelatine is melted.
  • Add the hot cream to the chocolate egg mixture and stir until smooth. Set aside.
  • Add the egg whites to a separate large bowl. Make sure the bowl is clean. Use an electric hand mixer to whip to soft peaks. Add a third of the sugar and whip for one minute. Repeat until all the sugar is in. Once in, whisk on high speed for 2 minutes until meringue is thick and glossy.
  • Finally, to a separate bowl whisk the remaining cream and vanilla extract together until you reach stiff peaks.
  • Add the cream to the chocolate module and gently fold through until well combine. Add the meringue and fold through until well combined.
  • Pour the mixture into the prepared springform pan. Use a spatula to flatten out the top. Chill in the fridge for four hours or overnight.
  • To remove, run a knife under hot water and dry. Run it around the top of the mouse layer before loosening it from the springform pan.
  • Carefully lift up the sides of the pan. Gently unwrap it from the acetate and slice to serve.

Notes

This cake can be stored in an airtight container for up to three days before it’s unwrapped. It is best served the day it’s unwrapped.

Nutrition

Calories : 405kcal
Carbonhydrates: 18g
Protein: 5g
Fat: 35g
Saturated Fat: 22g
Polyunsaturated Fat: 2g
Monounsaturated Fat : 10g
Trans Fat : 1g
Cholesterol: 197mg
Sodium: 63mg
Potassium : 107mg
Fiber: 1g
Sugar : 14g
Vitamin A: 1376IU
Vitamin C: 1mg
Calcium: 72mg
Iron: 1mg
Nutrition Disclosure

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6 comments

Holly Wood July 27, 2021 - 5:50 am

Would it be ok to half the mousse recipe so it isn’t so tall, or would it affect the texture/setting of it? 🙂

Reply
Nick Makrides July 27, 2021 - 6:23 am

That would be ok 🙂 N x

Reply
Claire Marina North August 27, 2021 - 3:11 am

5 stars
I like to bake alot and tried your recipie tonight. Unfortunately I could not find my 8inch springform pan so had to use a 9 inch and so the brownie was a little more thin than your recipie but it is delicious …and I am very finicky with baking. Your mousse is so light and it is a desert one would buy in a restaurant. thank you for this recipie

Reply
Nick Makrides September 19, 2021 - 2:57 am

That’s so lovely to hear Claire! I’m glad the recipe worked out and that you enjoyed it 🙂 N x

Reply
Kirti Bhargava August 30, 2021 - 6:06 am

Since we are not cooking the eggs, isn’t it like having raw eggs?

Reply
Nick Makrides September 19, 2021 - 2:45 am

Hi Kirti! Yes. the eggs in this recipe are raw. In most countries (but not all) raw eggs are safe to eat. N x

Reply

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