Betty Crocker vinyl? Yep. Cookbooks on record.
Spoken Word with Electronics unearthed a 40-album set of Betty Crocker cookbooks that was released in the 1950s as part of a “talking books for the blind” project by the Minnesota Department of Public Welfare.
According to the write-up, this material was recorded as flexi-discs recorded at 16 2/3 RPM to allow for up to 40 minutes per side, so the fidelity isn’t great. This a pretty cool bit of audio archeology.