Initial donor was a Smithsonian Institution librarian.
These items are termed cookbooks though most are pamphlets or booklets containing recipes.. They were produced either by a manufacturer of the ingredients of foods or by the manufacturer of appliances for which certain recipes or ways of cooking were particularly appropriate, so they also advertise the products represented.
2012 addendum (gift of Boldt family) includes recipe books issued by electric utilities in the state of Wisconsin and the city of Madison. Some of them feature the Reddy Kilowatt character.
Product Cookbooks Collection, 1874-2007, Archives Center, National Museum of American History