Prepare the chicken thighs by patting them dry and seasoning with salt and pepper.
In a mixing bowl, whisk together honey, soy sauce, minced garlic, apple cider vinegar, black pepper, and sesame oil.
Place chicken thighs in the slow cooker and pour the sauce over them.
Set the slow cooker to low and cook for 4-5 hours, or until chicken is tender and fully cooked.
Once cooked, remove chicken from the slow cooker and let it rest briefly before serving.
Serve the chicken thighs garnished with sliced green onions and drizzled with additional sauce from the slow cooker.