Preheat the oven to 350°F (180°C).

Wash and cut the apples into small pieces.

In a large bowl, whisk the eggs with the brown sugar and vanilla sugar until the mixture is light and frothy.

Add the flour and baking powder.

Pour in the milk, then add the apple pieces and mix well.

Pour the batter into mini muffin molds or small baking cups.

Bake for about 15 minutes at 350°F (180°C), or until the clafoutis are golden brown to your liking.