fry turkeys that are 10 to 13 pounds for 3 minutes per pound, and for turkeys from 14 to 20 pounds, cook for 3 1/2 minutes per pound. a 10-pound turkey will take about 30 minutes. a 20-pound turkey will require about 1 hour, 10 minutes. cook until the internal temperature reaches between 180 and 190 degrees fahrenheit.