In a spacious mixing bowl, combine the gochujang, honey, soy sauce, sesame oil, minced garlic, grated ginger, rice vinegar, brown sugar, and black pepper. Stir thoroughly until the mixture is smooth and ingredients are well blended to create a flavorful marinade.
Add the chicken wings to the marinade, ensuring they are fully submerged and evenly coated. Cover the bowl tightly with plastic wrap, and refrigerate for a minimum of 1 hour to allow the flavors to meld (longer marinating, such as overnight, will enhance the taste further).
Preheat your oven to 425°F (220°C). Line a baking sheet with aluminum foil to facilitate easy cleanup after cooking.
Position a wire rack on top of the lined baking sheet. Arrange the marinated chicken wings in a single layer on the rack, allowing air to circulate around each wing, which helps achieve a delightful crispiness.
Bake the wings in the preheated oven for 30-35 minutes, carefully flipping them halfway through cooking to ensure even crispiness and thorough cooking.
While the wings bake, measure out a few tablespoons of the remaining marinade to save for later. During the last 5 minutes of baking, brush this reserved marinade over the wings to infuse an extra layer of delicious flavor.
After the baking time is complete, remove the wings from the oven and brush them generously with the reserved marinade. Return the wings to the oven for an additional 5 minutes to set the glaze.
Once cooked, remove the wings from the oven and allow them to rest for about 5 minutes for optimal juiciness.
For serving, transfer the wings to a large platter. Garnish with a generous sprinkle of sesame seeds and a scatter of finely chopped green onions, adding vibrant color and an appealing finish to your dish.