This is self-publishing [author publishing]! The Joy of Cooking

Still in print since 1931!

https://en.wikipedia.org/wiki/The_Joy_of_Cooking

Joy of Cooking, often known as "The Joy of Cooking", is one of the United States' most-published cookbooks, and has been in print continuously since 1936 and with more than 18 million copies sold. It was privately published in 1931 by Irma S. Rombauer, a homemaker in St. Louis, Missouri, who was struggling emotionally and financially after her husband's suicide the previous year.

Rombauer had 3,000 copies printed by A.C. Clayton, a company which had printed labels for fancy St. Louis shoe companies and for Listerine, but never a book. In 1936, the book was picked up by a commercial printing house, the Bobbs-Merrill Company. Joy is the backbone of many home cooks' libraries and is commonly found in commercial kitchens as well.

The Joy of Cooking
Cover of 1975 edition
Author(s)	Irma S. Rombauer
Genre(s)	Cookbook
Publisher	Bobbs-Merrill, Scribner
Publication date	1931
ISBN	0-02-604570-2
OCLC Number	1444322