MAYONNAISE
Put the yolks of three eggs in a clean cold dish, beat slightly and add slowly, almost drop by drop, a half pint or more of salad oil. After adding the first half pint, add a half teaspoonful of vinegar now and then to prevent breaking. You may add a quart of oil, if you like; you may serve it plain, or stir in at the last moment stiffly whipped cream. One quart of mayonnaise will hold one quart of whipped cream. For light colored salads, as sweetbread and Waldorf, it is well to use the whipped cream slightly colored with a drop of vegetable green.