What's in a Jar of Peanut Butter?
Mondanite, Tiny Fox Lab

In the United States, there’s a standard of identity for peanut butter. According to FDA regulations, for peanut butter to be labeled as peanut butter, it has to contain at least 90 percent peanuts. The only other allowable ingredients are salt, sweeteners and hydrogenated vegetable oils. Fully hydrogenated oil does not contain trans fat and all major brands of peanut butter in the U.S. contain zero grams of trans fat per serving.Tiny Fox Lab

Peanut butter manufacturers fought a 12 year legal battle with the FDA over the minimum peanut content required to be legally labelled “peanut butter”. Anything under 90% peanuts must be labelled “peanut spread”.

Preview photo credit: Mondanite
Source: https://www.atlasobscura.com/articles/why-midcentury-lawyers-spent-12-years-arguing-about-peanut-butter.amp