Custard Filling

Add 2 cups of milk and 120 g of egg yolk to a saucepan

Add 50 g of cornstarch and a mix of 150 g of sugar and the seeds from 1 vanilla bean

Turn the heat to medium and whisk continuously until the cornstarch is activated and the mixture is very thick

Pass the custard base through a fine sieve

Place it in the refrigerator until it is slightly chilled

Pour ½ cup of heavy cream into a stand mixer bowl. Whip with a whisk attachment on medium speed until soft peaks are formed

Add the whipped cream to the custard base and mix to incorporate

Season with the zest of 1 lemon and mix

Transfer to a piping bag with a tip. The custard filling is ready

Enjoy! You can use it on doughnuts or any of your favorite desserts.