Boiled Dressing.

Half teaspoonful salt, 1 teaspoonful mustard, cayenne pepper, 2 teaspoonsful sugar, 1/4 cup vinegar (or juice of lemon), 1/2 tablespoonful flour, 1 egg, 1 1/2 tablespoonsful melted butter, 3/4 cup milk. Mix dry ingredients together and add to the vinegar. Beat the egg slightly and combine with the above. Place in a double boiler over hot water to cook at a low temperature, and add the milk gradually, stirring constantly, until the mixture thickens. Add the butter and then stand the dressing in cold water to cool.