In a medium bowl, whisk together all ingredients for the marinade except for the chicken wings.
1/4 cup Korean red chili pepper paste, 1/4 cup brown sugar, 1/4 cup soy sauce, 2 Tablespoons water, 1 Tablespoon sesame oil, 1 Tablespoon rice wine vinegar, 6 cloves garlic, 2 Tablespoons finely chopped onion, 1 Tablespoon fresh ginger, 1 teaspoon kosher salt, 1 teaspoon black pepper
In a separate large glass bowl or ziploc bag large enough to hold all of the meat, combine the chicken wings with the marinade and toss to coat. Cover or seal the container or bag and refrigerate for 2-4 hours (or up to overnight) to marinate the chicken.
4 pounds chicken wings and drumettes
When ready to cook the chicken wings, heat oven to 350°F. Line a baking sheet with parchment papper, then arrange the wings in a single layer on the baking sheet, pouring any extra marinade on top of the wings.
Bake for 45 minutes, then turn the temperature up to 400°F and flip each piece of chicken over using tongs, and bake another 15 minutes until cooked through.
Transfer cooked wings to a serving plate and sprinkle with sesame seeds and chopped scallions before serving.
Sesame seeds, Chopped scallions