delicious Berlin carnival donuts with vanilla cream recipe

The filling: Bring the milk, vanilla sugar, lemon zest and sugar to the boil in a saucepan.
Mix the whipped cream with the vanilla pudding powder and add to the milk mixture. Let it cook for about 1-2 minutes, then let it cool down.
Fill the carnival donuts with the vanilla cream either pour the cream into a piping bag and fill the donuts with it or another variant: cut the donuts and fill them.