Recipe for a versatile and rich dark chocolate mousse. The mousse can be used as a basis for an entremet (a mousse cake), poured into silicon molds and frozen, or enjoyed on its own.

Ingredients

• 400g + 50g cream, 35% fat, unsweetened
• 50g whole milk
• 50g egg yolks
• 15-70g sugar (depending on the chocolate, see note). 30 grams if using standard dark chocolate.
• 250g dark chocolate (see Selecting the right chocolate). I used Callebaut 54.5%. {: .ingredient-list}

The recipe can easily be doubled if needed.

Note: First time making a crème anglaise? It is usually easier to make a larger batch as this overcooks not as quickly as a small amount. Double the ingredients for the crème and halve after completing the crème anglaise.

Required materials

• Handmixer (or any mixer to make whipped cream)
• Bowls
• Saucepan
• Whisk
• Piping bag (optional)
• Molds, glasses, ramekins (anything to serve the mousse in) {: .material-list}

Steps

1. Prepare cream

Gently semi-whip 400g of the cream until you get soft peaks. Reserve in the fridge.

2. Making a crème anglaise

Combine egg yolks and sugar in a large bowl. The bowl should be big enough to contain both the eggs and the liquids (milk and cream).

Combine the milk and rest of the cream in a saucepan. Bring to a low boil. If you have a thermometer: a temperature of around 70°C is enough. Temper the eggs by slowing pouring the heated cream mixture in to the egg yolks.

Make a crème anglaise: Return egg/cream mixture to the saucepan and heat until the mixture reaches 82°C. Make sure to whisk continuously to prevent an uneven heating and to incorporate air bubbles. The mixture will become thick but make sure not to overcook it (as it will result in scrambled egg).

You can test whether the crème anglaise is ready without a thermometer: after heating, the mixture should coat the back of a spoon and not spread out when you make a line with your fingers.

3. Bring in the chocolate

Melt the chocolate in the microwave or using a double boiler. Combine crème anglaise with the chocolate. Make sure to mix it well but avoid creating (large) air bubbles. You can use a stick blender or do this by hand.

4. Combining

When the chocolate crème anglaise is around 38 degrees you can start adding the whipped cream. Work in batches and only add the new cream when the last batch is fully incorporated. If you add the cream when the chocolate is still to warm the mousse will collapse.

5. Serve

The mousse is now ready to be cast and cooled. For easy of use, transfer the mousse to a piping bag. Directly pour the mousse into molds, ramekins or glasses. Do not let the mousse cool inside the piping bag. Freeze the molds, or let the mousse cool in the fridge.

Pairing ideas

This mousse recipe can be used for many purposes. In the example below I transferred the mousse to a silicon mold and let them freeze overnight. As a standalone dish I usually pair it with caramelized pears and some white chocolate mousse.

Background of this recipe

A few years ago I discovered the fastest option to make chocolate mousse (or at least one that is very easy and takes almost no effort). That recipe uses a siphon for almost instant results. Although it is still the fastest option, I tend to use it less and less as it lacked the richness of a decadent chocolate mousse. Recently I found and adapted a new recipe that’s becoming my go-to recipe for chocolate mousse. It is versatile, still easy to make, and very rich.

This recipe is based on one I found on the Callebaut website. Some of the steps and ingredients have changed after testing. For one, I prefer a less sweet mousse that captures the flavour of a dark chocolate. This recipe reflects that by adding less sugar than more traditional recipes.

I have found that the secret to chocolate mouse lies in the first place not in the choice of chocolate. Of course, the chocolate is a very important ingredient and defines the flavour. However, even more important is the choice of binding agent: the ingredient that binds and stabilizes the mousse. Many recipes use gelatin which can result in a very stiff and jelly mousse. Some recipes use egg whites, resulting in an airy mousse. In this recipe I go for the rich option and use only egg yolks. Looking for a vegan alternative? See my Vegan Dark Chocolate Crème recipe.

With the egg yolks we create a crème anglaise which can be difficult definitely worth the effort. Getting experience in making crème anglaise is useful as it is used in many other (sweet) recipes as an ingredient or topping.

This recipe is my take on chocolate mousse. Some parts are still in development, especially the choice of chocolate and sugar ratio, so feel free to comment!

Selecting the right chocolate / fluidity of chocolate

The choice of chocolate is a very important part of any chocolate mousse recipe. Many will know that the amount of cocoa will say something about how bitter or sweet your chocolate and the resulting mousse is. There is, however, another aspect that we need to consider. Besides cocoa, the amount of cocoa butter directly influences the texture of the mousse:

If you used chocolate with a lower fluidity (i.e. containing less cocoa butter), it would yield a chocolate mousse with a really soft texture after crystallisation. It wouldn’t be solid enough to hold on a cake or inside a cake with the weight of different layers of cake filling on top. If you used chocolate with a higher fluidity (i.e. containing more cocoa butter) you’d get a chocolate mousse with a grainy, very solid and fatty texture, which would look and taste unappealing. – Callebaut fluidity explanation

Most professional brands of chocolate display the fluidity using a drop system. Callebaut, for example, uses the following descriptions:

1. Chocolate with a one-drop fluidity: great for infusing e.g. fillings, butter cream or ice cream with a hint of chocolate taste;

2. Chocolate with a two-drop fluidity: perfect for large moulded chocolate figures;
3. Chocolate with a three-drop fluidity: extremely versatile, ideal for any application;
4. Chocolate with a four-drop fluidity: best choice for moulded chocolates with a thin chocolate shell or (sharply) angular chocolate moulds;
5. Chocolate with a five-drop fluidity: excellent for applying a thin layer of chocolate on top of biscuits with a large surface.

Within this system we are looking for a chocolate with three drops, this results in a mousse with a nice texture. A three-drops chocolate corresponds to a chocolate that contains around 37% cocoa butter.

It is possible to deviate from this system. I, for example, sometimes mix chocolates to achieve a certain flavour or explicitly try to get a different texture. Just remember, in general the closer to the three drops the better.

No professional chocolate available? You can use store-bought general brands but keep in mind that the end product can differ slightly due to changes in cocoa butter content.

Selecting the right amount of sugar

The amount of sugar that this recipe requires is dependent on the type of chocolate and your personal taste. Personally, I prefer a dark chocolate mousse that is not to sweet and tend to pair this with a sweeter garnish instead (like caramelized pears). This contrast between a slightly bitter mousse and a nice pairing can really improve a dish. A more bitter mousse also pairs perfectly with another more sweeter mousse (a fruit mousse for example).

The type of sugar can be varied to achieve a desired taste. Regular granulated sugar works fine for almost all versions of this mousse. Various forms of brown sugar can also be used for a touch of caramel.

The table below can be used as a reference for selecting the amount of sugar. The percentages are based on the amount of chocolate, e.g. a 28% means that you have to take 28% of the weight of the chocolate as sugar. The amounts in grams are pre-calculated for this recipe.

Note: This table is a work in progress and will be updated when I try out more combinations. Use the “sweet-bitter” values as a rough range and adjust to your personal taste. The values in “my preference” are based on actual combinations I tried.

The combinations I’ve tested so far:

We’ll start of with a recipe that is simple and fast, doesn’t require eggs and is fun to serve!

Tip: Interested in another chocolate recipe? I also have a recipe for mousse based on crème anglaise which can be used for filling molds and entremets.

Ingredients

• 200 g dark or milk chocolate
• 200 ml heavy cream
• 100 ml milk
• 10-30 g powdered sugar (by taste)
• Vanilla pod or extract
• Amaretto (optional) {: .ingredient-list}

Required materials

• Whipping siphon (0.5L / 1L). I use a siphon from iSi, the Gourmet Whip but other brands will also do fine.
• Cream chargers (1 for 0.5L, 2 for 1L), like the ones from iSi. Make sure to get the cream chargers, the CO2 chargers won’t work. {: .material-list}

Time to make

10 minutes active time, 1 to 3 hours waiting.

Recipe

Step 1: Combine

Combine the heavy cream, the milk and powered sugar. Sugar is by taste, personally I prefer a darker mousse. Add some vanilla extract or seeds from a pod. If you are like my and love the Amaretto-chocolate flavour you can add some Amaretto liquor.

Melt the chocolate using any method (you don’t have to keep the chocolate in temper). Add to the cream mixture and mix until fully combined.

Step 2: Charge

Add the mixture to your whipping siphon. Make sure that the mixture doesn’t contain any lumps, this can clog up your siphon. To be sure, use a sieve. Check the maximum fill line of your siphon, don’t exceed this!

Ensure that your siphon is correctly sealed, make sure you add a tip. Add cream chargers: 1 for a 0.5L siphon, 2 for a 1.0L version. Shake, almost like your life depends on it!

Put the siphon in the fridge and let it cool for 1 to 3 hours (depending on the original temperature and the temperature of your fridge).

Step 3: Serve

Remove from the fridge before serving. Test the consistency of the mousse. If nothing comes out, let the siphon warm up a little bit.

Eat directly, as the mousse doesn’t contain any gelatin it will collapse quickly. You’re end result will look something like this:

Tip: If you have any guests that are not familiar with a siphon, let them serve their dessert! Who doesn’t get excited from instant chocolate mousse?