01 -
Coat a 5–6‑quart slow cooker with nonstick cooking spray.
02 -
Combine brown sugar, ketchup, chicken broth, onion soup mix, salt, pepper and red pepper flakes in a mixing bowl.
03 -
Heat oil in a nonstick skillet over medium‑high, season chicken with salt and pepper, sauté 3 minutes per side until golden.
04 -
Transfer seared chicken and sauce mixture to slow cooker, cook on low for 7–8 hours until chicken reaches 165°F.
05 -
Pour sauce into a small saucepan, whisk in cornstarch slurry and simmer until it bubbles and thickens to a glaze.
06 -
Plate chicken over mashed potatoes or rice and spoon glaze over top before serving.