In a medium bowl, combine hoisin sauce, rice wine vinegar, honey, garlic, ginger, red pepper flakes, sesame oil, and vegetable oil. Whisk until thoroughly combined.
Place chicken thighs in a large baking dish. Pour hoisin sauce mixture over the chicken, and mix well to coat. Sprinkle with salt and pepper.
Bake in preheated oven for 25 minutes, or until chicken is cooked through and sauce is bubbly.
Serve hot with steamed rice and vegetables.
Interesting Facts
Hoisin sauce is a thick, reddish-brown sauce commonly used in Chinese cooking.
It is made from fermented soybeans, garlic, chili, and various spices.
The flavor of hoisin sauce is sweet, spicy, and savory.