I’m stretching the definition of “from childhood” a bit, but I have persistently “remembered” that Taco Bell in the 1970s (i.e., when I was in high school) sold refried pinto beans as a Frijole, as I recounted recently in the thread about making homemade enchiritos.
Well, I’ve examined dozens of online photos of menus and ads and apparently it simply ain’t so. Always appears as Frijoles, plural, which makes sense, whereas Frijole, singular, does not. And yet it definitely got ensconced in my memory precisely because the name didn’t make much sense and I thought it was silly (“…as if you’re buying a single bean!”). Damned if I know how that got into my head that way.