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 completely smooth.
02 - Place chicken thighs in an even layer at the bottom of the slow cooker insert.
03 - Pour the prepared sauce mixture over the chicken, turning pieces to ensure all surfaces are thoroughly coated.
04 - Cover and cook on low setting for 4 hours until chicken is tender and reaches internal temperature of 165°F.
05 - Remove cooked chicken from slow cooker and shred into large bite-sized pieces using two forks. Return shredded chicken to the slow cooker and stir well to coat with sauce.
06 - Portion chicken and sauce over steamed jasmine rice or noodles. Garnish generously with sliced green onions and toasted sesame seeds.