Sources

Every recipe on this site comes from a cookbook published in 1930 or earlier. In the United States, works published in 1930 or earlier are in the public domain. Copyright rules differ in other countries.

We find books through the Internet Archive, which hosts scans and machine-read text of old books. We use only English-language books that the Internet Archive marks as not in copyright. A book that is missing a title, a publication year, or that mark is refused.

The books used so far are listed below, with the number of published recipes from each.