Place the egg yolks and sugar in a saucepan and whisk well.
75 g cane sugar, 3 egg yolks
Add the scraped vanilla seeds to the mixture. Use the pod for vanilla sugar, for example.
1 vanilla
Add about 1/4 of the total amount of cream and heat to approx. 70 °C while stirring. Check the temperature continuously using a kitchen thermometer.
100 g cream
Now keep at 70-75 °C for another 10 minutes, stirring continuously.
Turn off the stove and remove the pot.
Either cool the egg mixture quickly, e.g., in an ice bath or at appropriate temperatures outside, or, if you have time, simply place it in the refrigerator.
When the mixture is lukewarm at most, whip the remaining cream until stiff using a hand mixer.
300 g cream
Stir the egg mixture once more.
Fold the whipped cream into the egg cream. Work it in from the bottom up so that as much air as possible is retained from whipping.