Copyright law expressly does not cover recipes, because recipes are instructions on how to make a known product, and no lawmaking institution wants to criminalize Grandma copying a box recipe and giving it to her children and grandkids.
Photos and anecdotes are the common mechanisms used to make the recipe content copyrightable. Even physical cookbooks have these; they just seem longer on websites, because the format lends itself to more text-heavy presentation than a book, which normally has a full-page photo on one side and the recipe/short anecdote blurb on the other.
But don't take it from me, here's the FAQ from the US Copyright Office: https://www.copyright.gov/help/faq/faq-protect.html
> A mere listing of ingredients is not protected under copyright law. However, where a recipe or formula is accompanied by substantial literary expression in the form of an explanation or directions, or when there is a collection of recipes as in a cookbook, there may be a basis for copyright protection. Note that if you have secret ingredients to a recipe that you do not wish to be revealed, you should not submit your recipe for registration, because applications and deposit copies are public records. See Circular 33, Works Not Protected by Copyright.
And here is the relevant court case, Publications International, Ltd. vs Meredith Corp. with the legal criteria:
> In addition, nothing in our decision today runs counter to the proposition that certain recipes may be copyrightable. There are cookbooks in which the authors lace their directions for producing dishes with musings about the spiritual nature of cooking or reminiscences they associate with the wafting odors of certain dishes in various stages of preparation. Cooking experts may include in a recipe suggestions for presentation, advice on wines to go with the meal, or hints on place settings and appropriate music. In other cases, recipes may be accompanied by tales of their historical or ethnic origin.
https://scholar.google.com/scholar_case?case=182201036052136...