Mayonnaise Dressing

1/2 cup sugar
1 tablespoonful flour
1 teaspoonful mustard
1/8 teaspoonful salt
1 teaspoonful butter
2 eggs
3/4 cup diluted vinegar

Mix ingredients in order given, beating well before adding vinegar. Cook over slow fire, stirring continually. Cream, either sweet or sour, may be added before serving. Likewise chili sauce.