To cook or fry chicken in an oil fryer, first, you need to heat the deep fryer to 275 degrees Fahrenheit. After that, place the chicken in the given mesh basket and slowly lower it into the deep fryer. Keep it inside to cook for about 20 minutes. Use a food thermometer to measure the internal temperature of the chicken, to check if it is at least 180 degrees Fahrenheit. This should make the skin take on a crispy brown look. If you do not see the required changes, you'll need to keep it in for a bit longer.