Sauce for White Hashes or Chickens.
A pint of new milk, the yolk of two eggs, well beaten, two ounces of butter, well mixed with flour; mix it all together in a saucepan, and, when it boils, add two spoonfuls of mushroom ketchup; it must be stirred all the time, or it will not do. If used for cold veal or lamb, the meat must be cut as thin as possible, the sauce made first to boil, and then the meat put into it, till it is hot enough for table.