3 egg yolks, 3 spoonfuls of sugar, 200ml of cream or fresh milk or light milk, 500ml of yogurt, and appropriate amount of vanilla essence (this is made by myself and DIY is thorough). Practice: 1, add sugar to the egg yolk until it is milky white (electric egg beater will save a lot of effort); 2. Pour the cream into the pot, and cook on low heat until the pot bubbles (don't boil), slowly pour in the egg yolk and mix well;