Ideas are not in a fixed form and cannot qualify for copyright protection. The written description of an idea is fixed and can.
Slogans are too brief to qualify for copyright protection. But if they're connected to commerce, they can be trademarked.
Recipes are mere facts that cannot qualify for copyright protection. Descriptions of how to prepare a recipe can.
Other Forms of Intellectual Property Protection
A couple options to copyright protection
Even if certain kinds of works cannot qualify for copyright protection, they might qualify for trademark or patent protection.
Trademark "A trademark is generally a word, phrase, symbol, or design, or a combination thereof, that identifies and distinguishes the source of the goods of one party from those of others." ("Protecting Your Trademark." US Patent and Trademark Office, 2020. Accessed 2 Sept. 2020.)
APA (7th ed.)
The Copyright Desk. (YYYY, Month DD). [Page Name]. Arcadia University. Retrieved Month DD, YYYY, from [URL] Example: The Copyright Desk. (2020). Public Domain. Arcadia University. Retrieved September 1, 2020, from http://5asmz.greateasyphotos.com/landman-library/services/copyright/public-domain