Boiled Oil Dressing

A level tablespoonful of mustard, 1 of sugar, 1 teaspoonful of salt, 1-10 of a teaspoonful of cayenne, the yolks of 6 eggs, the juice of 1-2 lemon; 1/3 cup of vinegar; 1 cup of oil and 1 cup of, milk. Beat the yolks light with an egg beater, in a bowl, mix salt, sugar, mustard and pepper, and add to the yolks. Add the oil and vinegar slowly as in mayonaise dressing, then add milk, cook all together in a double boiler, stirring constantly until it forms a creamy coating on the spoon. The materials must be very cold. Set the bowl in a dish of ice water during the beating.