Place the chicken pieces in the bottom of your slow cooker. If using breasts, you might want to trim any excess fat.
In a medium bowl, whisk together the chicken broth, maple syrup, bourbon (if using), soy sauce, smoked paprika, chipotle powder, garlic powder, and black pepper. Pour this mixture evenly over the chicken in the slow cooker.
Secure the lid on the slow cooker and cook on LOW for 4-6 hours or on HIGH for 2-3 hours, until the chicken is cooked through and tender. Cooking time will vary depending on your slow cooker and the cut of chicken used.
Once the chicken is cooked, carefully remove it from the slow cooker and place it on a cutting board or in a bowl. You can shred it with two forks or slice it into bite-sized pieces.
Turn the slow cooker to the HIGH setting if it isn't already. In a small bowl, whisk together the cornstarch and cold water until smooth. Pour this slurry into the liquid remaining in the slow cooker. Stir well and let it simmer for about 15-20 minutes, or until the sauce has thickened to your desired consistency.
Return the shredded or sliced chicken to the thickened sauce in the slow cooker. Stir to coat the chicken evenly. Let it warm through for another 5-10 minutes.
Serve the Smoky Maple Bourbon Crockpot Chicken hot, garnished with fresh chopped parsley and sesame seeds, if desired.