To make this Southern Fried Chicken Batter gluten-free, replace the all-purpose flour with a certified gluten-free all-purpose flour blend or gluten-free rice flour. Use gluten-free soy sauce or tamari in place of regular soy sauce, since many soy sauces contain wheat. Confirm that the garlic powder, chili powder, paprika, salt, pepper, milk, eggs, chicken, and frying oil are gluten-free and free from cross-contact. Use clean bowls, utensils, tongs, measuring tools, and a dedicated frying area to prevent gluten contamination.