Heat up the whipping cream (1) to a boil.
Melt your milk chocolate in a double boiler or in the microwave in a large bowl.
Pour hot whipping cream (1) onto your milk chocolate and whisk.
Add the cold whipping cream and mix with an immersion blender until it becomes homogeneous. Let it rest in the fridge for 6 hours at least.
Whip to the desired consistency. Soft peaks for a mousse, stiff peaks for piping.