In a large mixing bowl, combine soy sauce, honey, olive oil, minced garlic, grated ginger, rice vinegar, sesame oil, black pepper, and crushed red pepper flakes (if using). Mix well until all ingredients are well combined.
Add the chicken drumsticks to the bowl and ensure they are thoroughly coated in the marinade. Cover the bowl with plastic wrap and let it marinate in the fridge for at least 30 minutes, or up to 2 hours for more flavor.
Preheat your oven to 400°F (200°C).
Line a baking sheet with aluminum foil for easy cleanup and place a wire rack on top. This will help the chicken cook evenly and get that sticky glaze.
Arrange the marinated chicken drumsticks on the rack, reserving the excess marinade in the bowl.
Bake the chicken in the preheated oven for 25 minutes. After 25 minutes, brush the drumsticks with the reserved marinade and bake for an additional 10-15 minutes, or until the chicken is fully cooked and the skin is caramelized. Use a meat thermometer to ensure the internal temperature reaches 165°F (75°C).
Once cooked, remove the drumsticks from the oven and let them rest for 5 minutes.
Notes
Serve with steamed rice or a fresh salad for a complete meal.