In a large bowl, stir together buttermilk, hot sauce, and 1 tablespoon salt. Add chicken; cover and refrigerate for 4 hours or up to 24 hours.
In a shallow dish, whisk together quick-mixing flour, all-purpose flour, pepper, and remaining 1 tablespoon salt. Dredge chicken in flour mixture, shaking off excess. Place on a wire rack; let stand for 15 minutes.
In a large cast-iron skillet, heat oil over medium heat until a deep-fry thermometer registers 365°. Place half of chicken, skin side down, in skillet. Cover and fry for 5 to 8 minutes; uncover, and turn chicken. Fry until a meat thermometer registers 165°, 6 to 10 minutes more. Let drain on paper towels. Repeat with remaining chicken.
Notes
*We used Wondra. This flour helps create an extra crispy crust for this buttermilk fried chicken.
Recipe by Southern Cast Iron at https://southerncastiron.com/perfect-fried-chicken/