Make drawn butter by receipt No. 2, but with double the quantity of
flour, and use, instead of water, the liquor in which the fish was
boiled. Add four tablespoonfuls of milk, in which a shallot and a head
of celery or a pinch of celery-seed has been boiled, then strained out.
Boil one minute, and stir in a teaspoonful of chopped parsley.