The best replacement for iron chef is iron chef america.

The best alternatives to iron chef are rated as following:
★★★★★  iron chef america
★★★★  super chef
★★★  top chef
★★  gordon ramsay
★★  swedish chef
★★  iron chef
★★  bobby flay
★  masterchef
★  duff
★  chopped
★  gordon ramsey
  michael smith
  rachel ray
  duff goldman

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Speaking about iron chef, one probably shouldn't forget about best record.

Other search terms related to iron chef and their ratings are:
★★★★★ best record
★★ mario batali
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iron chef
iron chef america
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