There is no difference between catsup and ketchup, a puree of tomatoes seasoned with other ingredients like mushrooms, walnuts, etc. The word ketchup may have come from Chinese (Amoy or Cantonese dialect) koechiap, k’e chap, or ke-tsiap ‘spiced fish sauce; brine of pickled fish’, which was likely borrowed from Malay kechap or kecap. Ketchup was [...]