Choose button mushrooms of uniform size. Wipe clean and white with
a wet flannel cloth, and cut off the stalks. Put into a porcelain
saucepan, cover with cold water, and stew very gently fifteen minutes.
Salt to taste; add a tablespoonful of butter, divided into bits and
rolled in flour. Boil three or four minutes; stir in three or four
tablespoonfuls of cream whipped up with an egg, stir two minutes
without letting it boil, and serve.
_Or,_
Rub them white, stew in water ten minutes; strain partially, and cover
with as much warm milk as you have poured off water; stew five minutes
in this; salt and pepper, and add some veal or chicken gravy, or drawn
butter. Thicken with a little flour wet in cold milk, and a beaten egg.