A keto chocolate mousse made with whipped egg whites, cocoa and butter, sweetened with erythritol, with no added sugar.
Dense in appearance but light by the spoonful, this keto chocolate mousse has a cool, firm texture, with a clean cocoa finish. Its intensity comes from cocoa powder and butter, powdered erythritol replaces sugar, and eggs provide the structure. The portions are small, at around 3 g of net carbs each, with a total time of about 2 h 30, including 2 h of preparation. One to add to my keto desserts.
What is keto chocolate mousse?
The word mousse first brings to mind air trapped in a mixture: here, whipped egg whites provide the volume, lightness and airy texture. The chocolate flavor comes from raw cacao powder, sifted to blend into a smooth, dark base.
Sweetened with erythritol and with no regular sugar added, the mousse relies on a short ingredient list: 3 egg whites, 3 yolks, 40 g of powdered erythritol, 40 g of raw cacao, 100 g of butter and a pinch of salt. The whites add air, the yolks bind the base and lend creaminess, and the salt brings everything to life. The result is firm yet light, intensely chocolatey, with a subtle buttery note, at around 257 kcal and 3 g of net carbs per serving.
The idea behind this keto version
This version keeps the idea of an airy, egg-based chocolate mousse, adapted to a ketogenic diet. The aim is a cool, light texture with few net carbs, thanks to small portions and the absence of traditional sugar.
Powdered erythritol takes the place of sugar, and the combination of cocoa powder and butter replaces bar chocolate. It remains an intensely flavored dessert, served well chilled, where the folding technique matters just as much as the ingredient list.
The main ingredients
Egg whites provide the aeration: whisked in a completely grease-free bowl with equally clean beaters, they become foamy, turn white, then stiffen. The slightest trace of yolk or fat prevents them from whipping up, so separate the eggs over a small bowl. The briefly beaten yolks provide binding and creaminess, and join the melted butter and cocoa to form a smooth base.
Fine, evenly textured powdered erythritol sweetens without regular sugar; added once the whites are foamy, it keeps the texture stable. Sifted raw cacao powder with no added sugar provides the intense chocolate flavor: do not confuse it with an instant drinking chocolate powder. Grass-fed butter, melted just enough to become liquid, coats the cocoa before firming up when chilled, and a pinch of salt heightens the cocoa flavor.
When serving, a few strawberries add a tangy note; count their carbs separately.
Technique tips and serving
Before whipping the whites, remove any grease from the bowl, mixer and beaters; if in doubt, rub them with lemon, rinse with hot water and dry. Beat the whites on their own until foamy, then gradually add the powdered erythritol after about 2 minutes, until you have a thick, stiff mixture that stays put when the bowl is turned upside down, without becoming dry; allow about 5 minutes of whisking, as overbeating weakens the structure. The melted butter must be lukewarm, never hot, before being mixed with the cocoa and then the yolks. First fold in a small portion of the whites with a spatula to loosen the base, lifting the mixture rather than pressing it down.
Chilling is essential to allow the butter to firm up and give the mousse a firm texture; no precise setting time is specified, and dividing the mixture among small containers makes serving easier. As it contains raw eggs, keep it covered in the refrigerator and eat it promptly; it is not recommended for pregnant women, young children, older adults or immunocompromised people, and should not be reheated. In France, powdered erythritol and unsweetened raw cacao can be found in specialist shops, organic food stores and online; check the label.
Explore all my keto recipes.
Keto chocolate mousse
Ingredients
- 3 egg whites
- 3 egg yolks
- 40 g powdered erythritol
- 40 g raw cacao powder
- 100 g butter (from grass-fed cows)
- pinch salt
Low-salicylate variation
- 4 tablespoons superfine sugar replaces the erythritol
Instructions
Preparation
- Make sure one of the mixing bowls is grease-free, as are the beaters. A freshly washed bowl will do. If in doubt, rub the bowl and beaters with lemon.
- Separate the egg whites from the yolks. Place the whites in a grease-free mixing bowl. Briefly beat the yolks, then set them aside.3 egg whites, 3 egg yolks
- Weigh out the powdered sugar, cacao powder, and butter. Sift the cacao powder: it must be completely free of lumps, otherwise the cacao-butter mixture will not be smooth.40 g powdered erythritol, 40 g raw cacao powder, 100 g butter (from grass-fed cows)
Egg whites
- Beat the egg whites vigorously with an electric mixer. The whites will turn white and opaque, then airy, and then increasingly stiff.
- After about 2 minutes, start adding the powdered erythritol. Add it a teaspoon at a time, beating between each addition. Finish with a pinch of salt.pinch salt, 4 tablespoons superfine sugar
- Beat for about 5 minutes in total. You can start at a low speed, but be sure to use the highest speed at the end. You need a truly thick mixture that does not move when you turn the bowl upside down. Refrigerate briefly while you continue with the preparation.
- Be careful not to beat for too long either. With regular sugar, beating for a long time is not a problem. But with erythritol, the egg whites can deflate.
Cacao-butter mixture
- Melt the butter. It should not get too hot, just liquid enough to work with.
- Add a little butter to the sifted cacao powder. Stir with a small fork, gradually adding more butter. Add the beaten egg yolks last.
Finishing
- Take the egg whites out of the refrigerator and first fold a little into the cacao-butter mixture with a spatula. Once evenly combined, add the cacao-butter mixture containing the egg whites to the bowl with the remaining whites. Gently fold everything together with a spatula until evenly combined.
- Ideally, return the mixture to the refrigerator briefly. The butter needs time to firm up a little again to give the mousse a firm texture. Put the whole bowl in the refrigerator to portion out the mousse later, or divide it into small containers now and refrigerate them ready to serve.
- This mousse has an intense flavor and a firm texture. A small amount per serving is enough. Serve with lightly sweet, tart fruit, such as strawberries, for a delicious accompaniment.
