Possibly from a Muskogean language.
sofky (uncountable)
- (US) A soup or stew made of hominy, cornmeal and bits of meat.
1968, Charles Portis, True Grit:There was another pot in the fireplace too, a big one, a two-gallon pot, and it was filled with a mess that looked like hominy. Rooster tasted it with a spoon and said it was an Indian dish called sofky.