Step 1: Prepare the Chicken: Pat chicken pieces dry with paper towels. Season with salt, black pepper, garlic powder, and onion powder. In a shallow bowl, mix flour and cornstarch. Dredge chicken pieces in the mixture, shaking off excess.
Step 2: Fry the Chicken: Heat vegetable oil in a deep skillet or fryer to 350°F (175°C). Fry chicken in batches for 6–8 minutes, or until golden brown and cooked through. Remove and drain on a wire rack or paper towels. Optional: For extra crunch, let chicken rest for 5 minutes, then fry a second time for 2–3 minutes until ultra-crispy.
Step 3: Make the Gochujang Sauce: In a small saucepan, combine gochujang, soy sauce, rice vinegar, honey, ketchup, sesame oil, garlic, and ginger. Simmer over medium heat for 3–5 minutes, stirring constantly until slightly thickened. Adjust consistency with a little water if needed.
Step 4: Toss Chicken in Sauce: Place fried chicken in a large bowl. Pour warm gochujang sauce over chicken and toss to coat evenly.