Boiled Dressing

1. 1

   Whisk eggs with flour, sugar, salt, and mustard in a 1-quart heavy saucepan, then gradually whisk in milk and vinegar.

2. 2

   Cook over moderately low heat, stirring constantly with a wooden spoon, until very thick and mixture registers 160F on an instant-read thermometer.

3. 3

   (Do not let boil.)

4. 4

   Pour through sieve into a metal bowl, then stir in butter until melted.

5. 5

   Put bowl in a larger bowl of ice and cold water and cool, stirring occasionally.

6. 6

   Cover surface of dressing with wax paper and chill.

No additional tips available.