Place the chicken pieces into a mixing bowl and pour the buttermilk over them. Ensure all the chicken is well-coated. Cover the bowl with plastic wrap and marinate in the refrigerator for at least 1 hour, or up to overnight for optimal flavor intensity.
In a separate mixing bowl, combine the gluten-free all-purpose flour, cornstarch, paprika, garlic powder, onion powder, black pepper, and sea salt. Whisk the dry ingredients together until thoroughly blended.
In another bowl, crack the eggs and beat them until the yolks and whites are fully incorporated. Set aside.
In a deep frying pan or pot, heat vegetable or canola oil over medium heat. Ensure the oil is hot enough to submerge the nuggets completely—approximately 350°F (175°C) is ideal for frying.
Once marinated, remove the chicken pieces from the buttermilk, letting any excess liquid drip off. Dip each chicken piece first into the beaten egg, allowing the excess to drip, and then roll it in the flour mixture, ensuring it is fully coated.
Carefully place the coated nuggets into the hot oil, frying in batches to prevent overcrowding. Fry for about 3-4 minutes on each side, or until the nuggets turn a golden brown and are fully cooked through (internal temperature should reach 165°F or 75°C).
Use a slotted spoon to transfer the cooked nuggets to a paper towel-lined plate, allowing them to drain excess oil and maintain their crispy texture.
Repeat the frying process with the remaining chicken pieces until all nuggets are cooked.
Notes
Serve with gluten-free dipping sauces like honey mustard or BBQ sauce. Garnish with parsley.