what special ingredients are added in it?
Sanders' Original Recipe of "11 herbs and spices" is one of the best known trade secrets in the catering industry.
KFC
Sanders' Original Recipe of "11 herbs and spices" is one of the best known trade secrets in the catering industry. 
what is the name of the owner of kfc Colonel Harland Sanders what is it? It is an American fast food restaurant chain. what is it full form? Kentucky Fried Chicken what is it famous for? fried chicken
wiki:19640026
KFC [SEP] The 11 herbs and spices
Sanders' Original Recipe of "11 herbs and spices" is one of the best known trade secrets in the catering industry. The recipe is not patented, because patent law requires public disclosure of an invention and provides protection only for a strictly limited term, whereas trade secrets can remain the intellectual property of their holders in perpetuity. A copy of the recipe, signed by Sanders, is held inside a safe inside a vault in KFC's Louisville headquarters, along with eleven vials containing the herbs and spices. To maintain the secrecy of the recipe, half of it is produced by Griffith Laboratories before it is given to McCormick, who add the second half.