01 - Whisk together soy sauce, brown sugar, hoisin sauce, chicken broth, rice vinegar, sesame oil, cornstarch, garlic, ginger, and red pepper flakes in a small bowl until smooth.
02 - Place chicken thighs in the bottom of the slow cooker, arranging them in an even layer.
03 - Pour the sauce mixture over the chicken, ensuring all pieces are thoroughly coated.
04 - Cover and cook on low heat for 4 hours, or until the chicken reaches an internal temperature of 165°F and is tender.
05 - Remove cooked chicken from the slow cooker and shred into large pieces using two forks. Return the shredded chicken to the slow cooker and stir well to coat in the sauce.
06 - Serve hot over steamed jasmine rice or noodles, garnished with sliced green onions and toasted sesame seeds.