You can find Gochuang in most Grocery Stores. It’s got plenty of heat. For me, I could go to 4 T for this recipe, but my family would likely have revolted, so I recommend starting with 3 T.
Note the chicken is cooked on a wire rack, skin-side up the entire time.
Since the chicken is not deep-fried, leftovers may not be super-crispy anymore, but rest assured, they are still phenomenal, especially with any leftover sauce!