Place chicken in a plastic resealable bag (or bowl with lid). Add the buttermilk, jalapeno juice, hot sauce, and egg. Seal the bag and shake to mix ingredients and coat the chicken. Marinate in the refrigerator for 3-4 hours.
Chicken
Remove chicken from the marinade bag and shake off excess liquid. Pour the leftover marinade into a wide shallow bowl for dipping.
In another wide shallow bowl for dredging, mix flour, salt, and pepper.
Dredge the chicken through the flour. Then dip the chicken into the marinade bowl to coat it again. Dredge again in the flour mixture to create a double coat of flour.
Pour approximately 1/2 inch of cooking oil into a skillet. Heat oil to 325°F. Add a few chicken breasts to the hot oil, taking care not to crowd the pan. Brown the chicken on both sides, then cook until tender, or the internal temperature reaches 160°F. Remove chicken to a platter. Do not stack or cover the chicken, as the crusts may stick together or become soggy.
Sauce
In a small saucepan, melt the butter and add the cooking oil. Add the spices and bring the mixture to a boil. Remove from the heat. Brush as little or as much hot sauce over the chicken breasts as desired just before serving, so the chicken stays crispy.
Serve with pickles and/or pickled jalapeno slices.
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