The official Aunt Jemima website notes that the character of Aunt Jemima was first "brought to life" by Nancy Green. Green was born into slavery in 1834 and R.T. Davis (the brand's owner at the time)
used her likeness to represent the the pancake mix into the early 1900s.
“Aunt Jemima advertising played on a certain type of nostalgia and a certain type of racial nostalgia, particularly in the first half of the 20th century about how great plantation life was and how great it was to literally, to have someone like Aunt Jemima who would make the pancakes or whatever for you,” Maurice Manring, author of “Slave in a Box: The Strange Career of Aunt Jemima,” explained in a 2019
interview with NPR. “When you look at old Aunt Jemima ads, you see constantly at a time when middle-class housewives were not able to employ servants, they weren't able to employ their black maid as easily as they did in previous decades, you see constant notation in the ads that you can't have Aunt Jemima today but you can have her recipe and that's the next best thing.”