Prep Seasoning: In a small bowl, mix together the basil, oregano, thyme, rosemary, parsley, and red pepper flakes, salt, and pepper.
Season Chicken: Add chicken breasts to a crock pot or Instant Pot and season the chicken breasts with half of the mixture. Flip the chicken with tongs and season the other side.
Mix Balsamic: In a small bowl, whisk together balsamic vinegar, chicken broth, brown sugar, and garlic. Pour on the chicken in the crock pot and top the chicken with butter.
Slow Cook: Cover and cook on low heat for 5-6 hours or high for 3-4 hours or until the chicken is fully cooked, when the internal temperature is 165 degrees.
Serve and Enjoy: Serve as whole breasts or shred in liquid and serve over rice.