CREAM DRESSING

Mix in double boiler
2 teaspoons flour
1 teaspoon salt
1 teaspoon mustard
1 ½ teaspoons powdered sugar and a
Few grains cayenne; add
1 teaspoon butter and
⅓ cup vinegar.

Cook over boiling water, stirring constantly until mixture thickens; add
1 egg yolk, and stir and cook 1 minute.

Cool and just before serving add
½ cup heavy cream, sweet or sour, beaten until stiff.