Instructions In a large bowl, combine 4 cups buttermilk, 1∕3 cup salt, and sugar. Add chicken pieces; cover and chill for 4 hours. In a large cast-iron skillet, pour oil to a depth of 2 inches. Heat over medium heat to 350°. In a shallow dish, combine flour, seasoned salt, and pepper. In a separate shallow dish, place remaining 1 cup buttermilk.