Using a fine grater, grate all the chocolate into a bowl.

Pour the milk into a saucepan, then add the chocolate and very gently heat until it melts. Once the chocolate has melted into the milk, add the honey and vanilla and mix well.

Put the yoghurt into a large bowl and whisk well to incorporate some air into it. Gradually fold in the chocolate milk mixture, using a rubber spatula, and pour into individual bowls.

Chill in the fridge for 2 hours.

Before serving, sprinkle a teaspoon of icing sugar over each bowl.