Turn your broiler on high and adjust your oven rack to the second position from the top. (It should be about 6 inches away from your broiler.)
Spread chicken wings on a large sheet pan. Pat dry, then season generously with Kosher salt. Broil for 15 minutes, then flip and broil 15 minutes more. Be sure to watch the chicken to ensure it does not burn.
While chicken is cooking, combine Momofuku Ghost Pepper Chili Crunch and Momofuku Rice Vinegar. (We recommend starting with 2 tablespoons of Chili Crunch. If you like things more spicy, add more to taste.) Stir in melted butter.
Toss cooked chicken wings with sauce and top with sliced scallions.
