Salad Dressing

One-half cup of milk, 1-2 cup of vinegar, 1-2 cup of butter, 2 teaspoonfuls of sugar, 1-2 teaspoonful of salt, 2 teaspoonfuls of mixed mustard, yolks of 4 eggs. Beat sugar and butter together, add beaten eggs and milk, with salt and mustard. Stir together and cook slowly in a farina kettle until it begins to thicken then add the vinegar slowly. Cook one minute.