Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2      tablespoons   Flour
   2      tablespoons   Sugar
   2      teaspoons     Dry mustard
     1/2  teaspoon      Salt
     2/3  cup           Vinegar
     1/3  cup           Water
   2                    Eggs -- well beaten
   1      teaspoon      Butter

Preparation:

In a saucepan, mix flour, sugar, dry mustard and salt. Stir in the vinegar and water; add the eggs. Cook, stirring all the while, until thick. Add butter; chill. You may want to thin this with a little cream when ready to use, as it does get pretty thick.