Slow cooker BBQ Chicken is made with a quick homemade sauce and can be enjoyed whole or shredded for a delicious BBQ chicken sandwich. It takes less than 10 minutes to get this into the slow cooker so you can set it and forget it!
Place chicken breasts into a 4 to 6 quart slow cooker. Top with onion slices.
In a small bowl, combine ketchup, brown sugar, Worcestershire sauce, red wine vinegar, garlic powder, salt, red pepper flakes, and mustard. Pour sauce over chicken.
Cover and cook 2 to 3 hours on high, or 4 to 5 hours on low.
Once the chicken is fully cooked you can enjoy whole or shred for sandwiches.