1. Leave the egg yolk and add sugar to beat
2. Add in low flour and continue to beat well
3. Heat the milk to a boil
4. Pour in one third and beat evenly
5. Pour in the remaining milk and beat well
6. Strain the beaten egg paste into a small pot
7. Heat on a small fire, keep stirring evenly
8. The egg paste gradually appears lines
9. Be careful not to burn too much when heating
10. The small pot is quickly cooled by cold water, and then put in the refrigerator after cooling.
11. Fragrant custard sauce
