This differs from the UK where fried chicken is more associated with the lower classes than a particular race.
>white American adults drink about three times as much coffee as blacks.
http://www.nydailynews.com/entertainment/gossip/shaquille-o-...
If you paint a swastika on a synagogue people will be upset, but not because they dislike shapes with 90 degree angles. If you say that black people love fried chicken people will be upset, but not because liking fried is unique to black people or inherently bad. It's mostly because it's a stereotype associated with a period in US history when it was socially acceptable for a white mob to lynch a black man for being rude.
I'm pretty sure that African American is not perfectly fine in this particular context.