Mrs. S.T. Rorer, Made-Over Dishes — Eggs (1908)
“ One of the ways of getting hard-boiled yolks, without wasting the whites, is to separate the white and the yolk before the egg is cooked; drop the yolk down into a kettle of boiling water; then stand on the back part of the stove for fifteen or twenty minutes until it is hard. The yolk will cook in this way just as well as with the white in the shell. Now, you have the uncooked whites, which may be used for a simple white cake, apple float, soufflés, plain or with fruit. ”
