Marinate chicken in buttermilk, ginger garlic paste, vinegar, lemon juice, salt, and pepper for 2–4 hours.
In a bowl, mix all flour mix ingredients thoroughly.
In another bowl, whisk egg whites with a pinch of salt.
Heat oil in a deep pan to 170–180°C (340–360°F).
Dip marinated chicken into flour mix, then egg wash, then flour mix again (double coating).
Gently place chicken into hot oil and fry for 6–8 minutes or until golden and crispy.
Drain on a wire rack or paper towels to keep the coating crisp.
Serve hot with Coleslaw and a chilled Mint Julep for a complete combo.