KFC uses pressure cookers to fry chicken, which is risky to do at home. If you are using a deep fryer, fry a few pieces at a time for about 20 minutes, covered, turning occasionally. Likewise, if pan frying, cook, covered, turning occasionally for about 30 minutes. As always with chicken, check the middle of a large piece to check for doneness. Allow to drain on paper towels when cooking is completed.