If I want to make Marilyn happy, it's quite simple: we make a dessert with chocolate. -- François

And this time, what I wanted to make for her was the best chocolate mousse possible. Mission accomplished.

I was inspired by a recipe from Joël Robuchon, a true legend of French gastronomy and one of the most Michelin-starred chefs in history. He was renowned for his precision, his mastery of techniques, and his ability to take relatively simple ingredients and turn them into something exceptional.

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And a chocolate mousse, actually, seems simple. There aren't fifty ingredients. But that's precisely why every detail matters: the temperature of the chocolate, the texture of the whipped cream, the egg whites, and especially how everything is incorporated.

I prepare it with my Ankarsrum, but you can easily make this recipe with a KitchenAid, an electric mixer, or even entirely by hand. The stand mixer mainly helps with whipping the cream and egg whites. The most important step, the final assembly, is done gently with a spatula anyway.

🍫 Summary
🔍 Information	Details
⏱️ Prep time	About 30 minutes
🍳 Cook time	About 5 minutes to melt the chocolate
❄️ Rest time	3 to 4 hours in the refrigerator
⏲️ Total time	About 3 hours 35 minutes to 4 hours 35 minutes
🔧 Difficulty level	Intermediate
🍽️ Servings	4 to 6
🔥 Approximate calories	About 285 kcal per serving based on 6 servings

What chocolate to use?

I used 70% dark chocolate.

I like this rather intense and less sweet chocolate flavor, but I know very well that it's not for everyone.

So you can adapt the recipe to your taste. A 60 or 65% dark chocolate will give a softer mousse. You can also use milk chocolate if you prefer something sweeter and creamier.

You can even mix two chocolates.

The rule is quite simple: choose a chocolate that you already enjoy eating on its own, because it will give almost all the character to your mousse.

Ingredients

For 4 to 6 servings:

🍫 Ingredients

150 g chocolate
30 g unsalted butter, softened
4 extra-fresh eggs, whites and yolks separated
60 ml heavy cream (30% fat), very cold
1 tbsp vanilla sugar
1 tbsp sugar
A small pinch of salt

The original recipe I used as a starting point uses dark chocolate between 66 and 70%.

Preparation

👨🍳 Instructions

1. Melt the chocolate
- Gently melt the chocolate in a double boiler.
- Then remove it from the heat and add the softened butter in small pieces. Mix with a spatula until the mixture is smooth.
- Then, let the chocolate cool slightly.
- Ideally, it should be around 35 to 40 °C (95 to 104 °F) before continuing. It must not be hot.
- This is a small detail that makes a big difference. If your chocolate is too hot, you risk cooking the egg yolks and melting the whipped cream. If it gets too cold, it can start to solidify and form small lumps when you incorporate it.
2. Whip the cream
- Pour the 60 ml of very cold cream into the transparent pastry bowl of your Ankarsrum with the double whisks.
- Whip at medium-high speed until you get a soft chantilly cream.
- The important word here is soft.
- We are not looking for very firm whipped cream. As soon as it holds its shape while remaining creamy, stop.
- Then refrigerate it.
- With a KitchenAid or an electric mixer, it's the exact same principle.
- And if you do it by hand, take a very cold bowl and a good whisk. It just requires a little more arm work.
3. Prepare the chocolate and egg yolk mixture
- In another bowl, whisk the four egg yolks with the vanilla sugar until the mixture lightens slightly.
- Then add the cooled chocolate.
- Mix thoroughly until you get a uniform preparation.
4. Whip the egg whites
- Rinse and perfectly dry the bowl and whisks.
- Pour the four egg whites with a small pinch of salt.
- With the Ankarsrum, start at medium speed to create a fine foam, then gradually increase the speed.
- When the whites start to be well whipped, add the tablespoon of sugar.
- Continue until you get beautiful soft peaks.
- What we want are well-whipped but still soft egg whites.
- If you beat them too long and they become dry or grainy, they will be harder to incorporate and you risk losing some of the mousse's lightness.
5. Assembly
- And here, no matter what mixer you use: put it away.
- This step is done with a spatula.
- Start by gently incorporating the whipped cream into the chocolate mixture.
- Then add about one-third of the egg whites. This first portion can be mixed a little more firmly to loosen the preparation.
- Then add the remaining whites in two additions.
- And here, take your time.
- With the spatula, start from the bottom of the bowl and fold upwards, rotating the bowl gradually.
- The goal is to retain as many of the small air bubbles you just created as possible.
- This step is truly what gives the mousse its light and airy texture. The reference recipe emphasizes not using a mixer for the final assembly.
6. Chilling
- Pour your mousse into small ramekins, glasses, or simply into a large serving dish.
- Then place it in the refrigerator for at least 3 to 4 hours.
- And leave it alone.
- I recommend taking it out of the refrigerator about 15 minutes before serving.
- It becomes slightly softer and the chocolate flavors stand out more.

Ankarsrum, KitchenAid, or by hand?

All three work.

With the Ankarsrum, I use the transparent pastry bowl and the double whisks to whip the cream, then the egg whites. The reference recipe specifically states not to use the stainless steel bowl or the roller for these steps.

With a KitchenAid, simply use the whisk attachment and prepare both mixtures separately.

With an electric mixer, the same applies.

And by hand, you'll just need a good whisk and a little more patience.

What matters much more than the machine is getting the textures right.

The cream should remain soft.

The whites should be whipped without becoming dry.

And once you start assembling the mousse, everything is done with a spatula.

My three important points

Monitor the chocolate temperature. It should be lukewarm, not hot, when adding it to the yolks.
Do not over-whip the cream or egg whites. We want to incorporate air, not create something dry and brittle.
Take your time during assembly. This is where you decide if you're going to have a heavy mousse or a light and airy mousse.

And the result?

A very chocolatey mousse, creamy, light, and most importantly, not overly sweet.

With my 70% chocolate, it truly has a pronounced chocolate flavor. But if you make it with a milder chocolate or even milk chocolate, you'll get a completely different mousse while maintaining the same technique.

And that's what I love about this recipe.

You can truly make it to your taste.

And above all, in my case, Marilyn was happy.

So, mission accomplished.

Nutritional Information per Serving
Nutrient	Quantity
Calories	Approximately 285 kcal
Protein	Approximately 6 g
Carbohydrates	Approximately 19 g
Sugars	Approximately 14 g
Fiber	Approximately 3 g
Fats	Approximately 22 g
Saturated fatty acids	Approximately 12 g
Sodium	Approximately 55 mg
Health rating	6/10 Strengths: relatively low-sugar dessert, dark chocolate rich in cocoa, and satisfying portion. To consider: the recipe remains rich in fats and saturated fats due to chocolate, butter, cream, and egg yolks.

🍫 Did you know? Chocolate has a history of almost 5,000 years
Long before becoming a bar or a dessert, cocoa was consumed as a drink, used in ceremonies, and at certain times, its beans even served as currency. Here is its incredible journey through time.
Era	Visual cue	What happened
~3300 BCE		Ancient traces show that cocoa was already used by South American populations several millennia ago.
Mesoamerican Civilizations		Among the Mayans and then the Aztecs, cocoa became a prestigious drink associated with elites, ceremonies, and trade.
16th century		Cocoa arrived in Europe. Chocolate drinks began to be sweetened, quickly becoming highly sought after in European courts.
19th century		Industrial techniques completely transformed chocolate: cocoa powder, solid chocolate, and finer processes opened the door to chocolate as we know it today.
The amazing detail: At certain periods in Mesoamerica, cocoa beans were valuable enough to be used as a medium of exchange. In other words, long before it was a sweet treat, chocolate literally had value.

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