Pour the milk into a saucepan.

Add the lemon zest and heat gently over medium heat until warm (do not boil).

Mix Eggs and Sugars

In a bowl, whisk together eggs, sugar, and vanilla sugar until the mixture is smooth and pale.

Combine and Cook

Slowly pour the warm milk into the egg mixture while continuously whisking to prevent curdling.

Return the mixture to the saucepan. Cook over low heat, stirring constantly until it thickens to a creamy consistency.

Cool and Serve

Remove from heat and let it cool slightly.

Pour into serving dishes and refrigerate for at least 1 hour before serving.

Serving Tips