Everyone loves a secret sauce – never mind the fact that they’re hardly ever actually a secret. Practically every fast food special sauce is the same thing, basically a spin on Thousand Island dressing. However, plenty of lesser-known regional condiments have managed to retain some air of mystery, like Utah fry sauce or Washington D.C.’s mambo sauce. Then there’s the secret sauce from the American South that has been winning hearts for more than a century: comeback sauce.