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, ensuring even distribution.
03 - Pour the sauce mixture over the chicken, coating all pieces thoroughly.
04 - Cover and cook on low heat for 4 hours until chicken is tender and reaches an internal temperature of 165°F.
05 - Remove cooked chicken and shred into large pieces using two forks. Return to the slow cooker and toss to coat evenly in the sauce.
06 - Plate hot over steamed rice or noodles, garnished with sliced green onions and toasted sesame seeds.