Pat Dry: Remove your chicken pieces from the refrigerator 15 minutes before coating and pat them completely dry with paper towels, as moisture prevents proper coating adherence.
Prepare the Egg Wash: In a shallow bowl, whisk together the beaten eggs and buttermilk until smooth and well combined.
Mix the Coating: In another shallow bowl or plate, combine the flour, crushed cornflakes, paprika, garlic powder, onion powder, black pepper, and salt, stirring thoroughly until the spices are evenly distributed throughout.
Coat the Chicken: Dip each piece of chicken into the egg wash, making sure all sides are covered, then roll generously in the flour and cornflake mixture, pressing gently so the coating adheres firmly and creating that signature crunchy texture.
Heat the Oil: Pour vegetable oil into a large, heavy-bottomed pot or deep skillet to a depth of 2 to 3 inches and heat to 350 degrees Fahrenheit, using a deep-fry thermometer to ensure accuracy.
Test the Temperature: Drop a small piece of coating into the oil; it should sizzle immediately and rise to the surface within 2 to 3 seconds, confirming the oil is at the right temperature.
Fry the Chicken: Carefully place the coated chicken pieces into the hot oil, working in batches so as not to overcrowd the pan, and fry for 12 to 15 minutes until the coating is deep golden brown and an instant-read thermometer inserted into the thickest piece reads 165 degrees Fahrenheit internally.
Drain and Rest: Transfer the fried chicken to a wire rack or paper towel-lined plate and allow it to rest for 5 minutes before serving, which helps preserve the crispiness.