Place the chicken breasts in an even layer at the bottom of your slow cooker.

In a medium mixing bowl, whisk together the condensed cream of chicken soup, the chicken gravy mix packets, chicken broth, garlic powder, and black pepper until well blended.

Pour the gravy mixture over the chicken breasts in the crockpot.

Cover the slow cooker with the lid.

Cook on LOW for 6 to 8 hours or on HIGH for 3 to 4 hours.

Once the chicken is fully cooked and tender, use two forks to shred the chicken into bite-sized pieces directly in the slow cooker.

If using sour cream, stir it in now until the sauce is creamy and smooth.

Taste the gravy and add a little more pepper if needed. Serve warm over your favorite base.