Method
Preparation
Melt the dark chocolate in a heatproof bowl over simmering water. Once melted, remove from heat and let cool slightly.
Repeat the process for the milk chocolate and then the white chocolate, each in separate bowls.
Make the Dark Chocolate Mousse
Whip 1 cup of heavy cream until soft peaks form.
In another bowl, whisk the egg yolks and half of the sugar until pale.
Fold in the melted dark chocolate and then gently fold in the whipped cream. Set aside.
Prepare the Milk Chocolate Mousse
Repeat the same steps as for the dark chocolate mousse with the milk chocolate using another cup of heavy cream and the remaining sugar.
Craft the White Chocolate Mousse
Follow the same steps one more time using the white chocolate and the last cup of heavy cream.
Layer the Mousse
In a springform pan, pour the dark chocolate mousse as the base layer. Freeze for 30 minutes until set.
Follow with the milk chocolate layer, freeze again for 30 minutes, and finish with the white chocolate layer.
Cover and refrigerate for at least 4 hours (or overnight) until fully set.
Serve
Carefully release the mousse from the springform pan.
Garnish with chocolate shavings if desired. Slice and enjoy!
Notes
You can use unsweetened chocolate if you prefer a more intense chocolate flavor. Adjust the sugar according to taste. Optional: Add a layer of fruit puree for a tangy contrast. Store leftovers in the refrigerator for up to 3 days or freeze for up to 1 month; thaw in the fridge before serving.