Lepiota procera.
Clean the caps with a damp cloth and cut off the stem close to the caps; broil lightly on both sides over a clear fire or in a very hot pan, turning the mushrooms carefully three or four times; have ready some freshly-made, well-buttered toast; arrange the mushrooms on the toast and put a small piece of butter on each and sprinkle with pepper and salt; set in the oven or before a brisk fire to melt the butter, then serve quickly.
Some persons think that slices of bacon toasted over the mushrooms improve the flavor.