Required: Two hard-boiled eggs. The raw yolks of two eggs. Eight tablespoonfuls of salad oil. Half a teaspoonful of made mustard. Two tablespoonfuls of tarragon vinegar. Pepper and salt to taste.

Rub the hard-boiled yolks of the eggs in a basin with a wooden spoon until they are smooth; then add the raw yolks one by one, work them well together; then stir half the oil very slowly into them; next mix in the mustard, and continue adding the rest of the oil gradually. Lastly, stir in the vinegar, and salt and pepper to taste.