Put to a little water just warm a little salt; stir in a quarter of a pound of butter; it must not boil. When well mixed, let it stand till cold: then stir in three eggs, one at a time, beating it well till it is quite smooth; then add three more eggs, beating it well, and half a pound of Parmesan cheese. Beat it well again, adding two yolks of eggs and a quarter of a pound of cold butter, and again beat it. Just before it is going into the oven, beat six eggs to a froth, and beat the whole together. Bake in paper moulds and in a quick oven. Serve as hot as possible.