The first thing to check if your chicken is not cooking through, is if your frying oil is at the correct temperature. The best temperature to fry chicken at is 375 degrees. If your frying oil is at 375 degrees and your chicken is still not cooking in the middle, be sure not to overcrowd the pan. To get the chicken crispy and fully cooked, it needs room around it to let the heat and moisture escape. If the fried chicken is touching other pieces of fried chicken, it will steam instead of fry and result in an undercooked center.