Gather your ingredients: honey, soy sauce, minced garlic, rice vinegar, sesame oil, and chicken breasts.
In a small bowl, whisk together honey, soy sauce, minced garlic, rice vinegar, and sesame oil until smooth and fragrant.
Place the chicken breasts in the slow cooker, spreading them out evenly.
Pour the honey garlic mixture over the chicken, ensuring each piece is coated well.
Cover and cook on low for 4 to 5 hours, until the chicken is tender and the glaze starts to thicken.
Every hour, open the lid briefly and brush the chicken with the sauce using a basting brush—this builds a beautiful glossy, caramelized coating.
Once the chicken is cooked through and the sauce is thick and sticky, turn off the slow cooker and let it rest for 5 minutes.
Transfer the chicken to a serving platter, spoon over any remaining glaze, and sprinkle with optional red pepper flakes or sesame seeds for extra flavor and presentation.
Serve hot over rice, noodles, or roasted vegetables, and enjoy the tender, caramelized goodness.