That Negro slave, or later in history...that Negro servant, of yours whom you had affection for, but certainly would NOT consider to be your equal, would be addressed as "aunt", or "uncle".
Thats what the branding was about. Aunt Jemima was that Negro slave ...who sure knew how to whip up some great pancakes for the plantation. So we have affection for her.
By the time of my Boomer childhood in the Sixties the Aunt Jemima character was already an anachronism. But it was a well known brand. So you still saw her on the grocery store shelf. Mom would joke about how they gave her a "make over". Her face did evolve during the Sixties so she looked a little less like a slave, and more like a respectable matron with make up. But that just kinda made it even more pathetic. So I am not surprised that they finally put AJ out of her misery, and the same with uncle Ben. Mrs Butterworth is different. She didnt even exist AFAIK until the late Seventies, and she never had any particular race as far as I know.
But I do admit that even though uncle ben and aunt jemima harken back to the days when Blacks were seen as servants, and only as servants, they arent nasty and mean as stereotypes. Just a bit demeaning, and bit anachronistic by my day- even my day fifty years ago.
But on the other hand, I do admit that...I still havent gotten over the loss of "the Frito Bandito".
During the Sixties Fritos corn chips had a cartoon guy in white Mexican peasant garb, and a sombero, with a bullet belt around his shoulder and six guns on his hips, and little black mustache -on the package. And you would see him firing his guns as he hawked the corn chips on TV commercials. He was the "Frito Bandito". What better spokesman for Mexican style corn chip snacks than a cartoon Mexican guy?
Around 1970 he became one of the first "victims" of PC when Frito-Lay decided that he was too much of a bad ethnic stereotype and removed him. Oh well.
I was already sick of AJ when I was child fifty years ago, but I thought the Frito Bandito was kinda cool. So I cant claim to have a truly consistent opinion about it.