Guidelines in preparing vanilla custard sauce
1. Use clean sanitized equipment and follow procedures
2. When combining the egg yolks and sugar, whip the mixture as soon as the sugar is added
3. Scald milk before combining with the yolks
4. Slowly beat the hot milk into the beaten eggs and sugar
5. Place a bowl with egg mixture in a pan of simmering water and stir constantly to prevent curdling
6. To test for doneness, the mixture lightly coats the back of the spoon
7. Immediately cool the sauce by setting the pan or bowl in ice water
8. If the sauce curdles, transfer the sauce to a blender and blend at high speed