Name: Mary Berry Chocolate Mousse Recipe
Prep time: 20 min
Cook time: 10 min
Total time: 3 h
Ingredients: 200g dark chocolate (70% cocoa solids), broken into pieces; 30g unsalted butter, cubed; 3 large eggs, separated; 2 tablespoons caster sugar; 200ml double cream, cold; 1 teaspoon vanilla extract; a pinch of fine sea salt; a little grated dark or milk chocolate for scattering; a small spoonful of lightly whipped cream per portion (optional)

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This chocolate mousse is a silky, deeply dark dessert with a light, airy set and an intense cocoa finish that lingers on the palate. It holds its shape cleanly when spooned but melts almost instantly, leaving behind a rich, bittersweet coating. This version keeps the process straightforward, with no specialist equipment needed and results that are consistent every single time. It suits a dinner party just as well as a quiet weekend treat. From start to finish, including chilling time, it is ready in around 3 hours.

The key to this Mary Berry chocolate mousse recipe is careful temperature control when folding the egg whites and cream into the melted chocolate. Getting that balance right gives the mousse its characteristic lift without losing the dense chocolate body.

Ingredients

For the mousse

200g dark chocolate (70% cocoa solids), broken into pieces
30g unsalted butter, cubed
3 large eggs, separated
2 tablespoons caster sugar
200ml double cream, cold
1 teaspoon vanilla extract
A pinch of fine sea salt

To finish

A little grated dark or milk chocolate, for scattering
A small spoonful of lightly whipped cream per portion (optional)

How to Make Mary Berry Chocolate Mousse Recipe

Melt the chocolate: Place the broken chocolate and butter in a heatproof bowl set over a pan of barely simmering water, making sure the base of the bowl does not touch the water. Stir gently every minute or so until fully melted and glossy, then remove from the heat and leave to cool for about 10 minutes. Cooling is important here, as pouring hot chocolate directly onto the egg yolks would scramble them.
Beat in the yolks: Add the three egg yolks, vanilla extract, and salt to the cooled chocolate mixture, one yolk at a time, stirring well after each addition until the mixture is smooth and combined.
Whip the cream: Pour the cold double cream into a clean bowl and whisk to soft peaks. The cream should hold a gentle curl when the whisk is lifted but not look stiff or grainy. Set aside in the fridge.
Whisk the egg whites: In a separate, completely clean and dry bowl, whisk the egg whites until foamy. Add the caster sugar gradually and continue whisking until the mixture reaches firm, glossy peaks. Any trace of fat in the bowl will prevent the whites from holding their volume, so check the bowl and whisk are grease-free before starting.
Fold in the cream: Using a large metal spoon, fold the softly whipped cream into the chocolate mixture in two stages. Use a gentle cutting and folding motion rather than stirring, to keep as much air in as possible.
Fold in the egg whites: Add one large spoonful of the whisked egg whites to the chocolate mixture and stir through fully to loosen the base. Then fold in the remaining egg whites in two additions, working carefully and patiently. Stop as soon as no white streaks remain.
Spoon and chill: Divide the mousse between four to six serving glasses or ramekins. Cover loosely with cling film and refrigerate for a minimum of 2 hours, or until set with a slight wobble when the glass is gently moved.
Finish and serve: Just before serving, scatter a little grated chocolate over the top of each portion. Add a small spoonful of lightly whipped cream alongside if desired.

Tips for the Best Mary Berry Chocolate Mousse

Why has my chocolate mousse turned grainy or split?

This happens when the melted chocolate is too hot when the other ingredients are added. Allow the melted mixture to cool until it feels just warm to the touch before incorporating the egg yolks or cream. If it begins to look curdled, try adding a small splash of warm cream and stirring gently to bring it back together.

Why is my mousse not setting firmly after chilling?

The mousse needs a minimum of 2 hours in the fridge to firm up properly, and up to 4 hours for a very clean set. If it still appears too loose after that time, the cream may have been under-whipped before folding. Soft peaks, not liquid cream, give the mousse its structure.

Why does my mousse taste flat despite using good chocolate?

The pinch of salt and the vanilla extract both play a role in bringing out the full depth of the chocolate. Without them, even a quality 70% cocoa solid chocolate can taste one-dimensional. Make sure neither is skipped.

Why does my mousse have a dense, heavy texture instead of a light one?

Over-mixing when folding in the egg whites is the most common cause. Once the white streaks disappear, stop immediately. Continued stirring knocks the air out and produces a thick, fudgy result rather than the airy, cloud-like set the recipe is aiming for.

Why did my egg whites collapse before I could fold them in?

Egg whites begin to weep and lose volume quickly once whisked, so fold them into the chocolate mixture within a few minutes of reaching firm peaks. Work at a steady pace and avoid leaving the whisked whites sitting uncovered on the counter for any length of time.

Serving Suggestions

Serve chilled with a light dusting of cocoa powder for a clean, café-style finish.
Pair with a thin shortbread finger or a crisp langue de chat biscuit on the side for texture contrast.
Spoon into small espresso cups for a neat, bite-sized dessert at a dinner party.
Offer alongside a bowl of fresh raspberries or sliced strawberries to cut through the richness.
Serve with a small pour of single cream for those who prefer a lighter finish at the table.

Storage

Room Temperature

The mousse should not be left at room temperature for more than 1 hour due to the raw eggs and cream.

Refrigerator

Cover each portion with cling film and store in the fridge for up to 2 days. Remove from the fridge 10 minutes before serving to take the sharp chill off, which allows the chocolate flavour to come forward more clearly.

Freezing

Spoon the set mousse into freezer-safe containers with tight-fitting lids and freeze for up to 4 weeks. To defrost, transfer to the fridge the night before serving and leave overnight, then add any toppings fresh just before bringing to the table.

Nutrition

Calories: 320 kcal
Carbohydrates: 22g
Protein: 6g
Fat: 24g
Saturated Fat: 14g
Sodium: 75mg

Nutrition values are estimates based on the ingredients listed and will vary depending on the specific brands used and actual serving size.

FAQs

Can I use milk chocolate instead of dark chocolate in this mousse?

Yes, milk chocolate can be used, though the mousse will be noticeably sweeter and slightly less firm due to the lower cocoa solids content. Reduce the caster sugar to 1 tablespoon if switching to milk chocolate, to prevent the result from becoming overly sweet.

Can I make this chocolate mousse the day before serving?

Yes, and it is actually better for it. Making the mousse a day ahead gives it a full 12 to 24 hours to set thoroughly, which improves both the texture and the depth of flavour. Simply keep the portions covered in the fridge and add any toppings just before serving.

Is this mousse suitable for people with a nut allergy?

The recipe itself contains no nuts, but always check the packaging on the chocolate used, as some dark chocolates are produced in facilities that also handle tree nuts. Choose a brand with a clear nut-free label if serving to someone with an allergy.

Can I make this recipe without raw eggs?

The raw egg whites and yolks are central to the mousse’s texture, so the recipe cannot be made entirely egg-free without significant changes. For those concerned about raw eggs, use pasteurised eggs, which are widely available in UK supermarkets and reduce the associated risk while behaving in the same way in the recipe.

How many portions does this recipe make?

This recipe makes 4 generous portions or 6 smaller ones, depending on the size of the glasses or ramekins used. For a dinner party where other desserts are also being served, 6 smaller portions work well.

Conclusion

This Mary Berry chocolate mousse recipe delivers a result that balances real depth of flavour with a texture that is light and set, without being stiff or heavy. It uses straightforward techniques and a short ingredient list, making it one of the more reliable chocolate desserts to have in the repertoire. The recipe yields 4 generous or 6 smaller portions, which scales well for both a household pudding and a dinner party spread.

If you have tried this recipe, leave a comment below to share how it turned out or to ask any questions. Sharing the recipe with friends and family is always appreciated. For another classic bake to try next, you might also enjoy the Mary Berry fork biscuits recipe, a simple, buttery biscuit that is ideal for baking alongside a batch of mousse for a complete dessert spread.