1In a large bowl, combine Gochujang, Gochugaru, Soy Sauce, minced Garlic, minced Ginger, Sugar, Mirin, Sesame Oil, and Black Pepper to create the marinade.
2Add the cut Chicken Thigh pieces to the marinade bowl and mix thoroughly, ensuring all chicken is well coated. Marinate for at least 30 minutes, or up to 2 hours in the refrigerator.