Place the milk, cream and vanilla pod in a pan with 40 grams of the sugar and bring to a boil, whisking until the sugar dissolves. Turn off the heat. In a bowl, whisk the egg yolks with the remaining sugar, flour and cornflour to form a smooth paste.
Discard the vanilla pod from the warm cream mixture, then slowly pour it onto the eggs, whisking constantly so they don’t scramble. Once e