Fannie published her best-known work,
The Boston Cooking-School Cook Book, in 1896. A follow-up to an earlier version called ''
Mrs. Lincoln's Boston Cook Book'', published by
Mary J. Lincoln in 1884, the book under Farmer's direction eventually contained 1,850 recipes, from
milk toast to
Zigaras à la Russe. Farmer also included essays on
housekeeping, cleaning,
canning and drying fruits and vegetables, and nutritional information. The book's publisher (
Little, Brown & Company) did not predict good sales and limited the first edition to 3,000 copies, published at the author's expense. However, the book was so popular in America, so thorough, and so comprehensive that cooks would refer to later editions simply as the
Fannie Farmer Cookbook, and it is still available in print over 100 years later. Farmer provided scientific explanations of the
chemical processes that occur in food during cooking, and helped to standardize the system of measurements used in cooking in the USA. Farmer left the School in 1902 and created Miss Farmer's School of Cookery. She began by teaching gentlewomen and
housewives the rudiments of plain and fancy cooking, but her interests eventually led her to develop a complete work of
diet and nutrition for the ill, titled
Food and Cookery for the Sick and Convalescent, which contained thirty pages on diabetes. Farmer was invited to lecture at
Harvard Medical School and began teaching convalescent diet and nutrition to doctors and nurses. She felt so strongly about the significance of proper food for the sick that she believed she would be remembered chiefly by her work in that field, as opposed to her work in household and fancy cookery. Farmer understood perhaps better than anyone else at the time the value of appearance, taste, and presentation of sickroom food to ill and wasted people with poor
appetites; she ranked these qualities over cost and nutritional value in importance. ==Later life==