In a mixing bowl, combine the cream of chicken soup, onion soup mix, chicken broth, garlic powder, and black pepper. Whisk until well blended.
In a skillet, heat the olive oil over medium heat. Sear the chicken breasts for about 2-3 minutes on each side until lightly browned (optional).
Place the seared chicken breasts in the crockpot. Pour the soup mixture over the chicken, making sure it is evenly coated.
Cover the crockpot with the lid and cook on low for 6 hours or until the chicken is tender and fully cooked.
Once cooked, shred the chicken in the crockpot using two forks, mixing it well with the gravy.
Serve the chicken and gravy over cooked rice or mashed potatoes.
For added flavor, you can include vegetables such as carrots and peas in the crockpot.
If you prefer a thicker gravy, remove the lid in the last hour of cooking to allow it to reduce.
Store leftovers in an airtight container in the refrigerator for up to 3 days.