Creating this golden dish is easy when you follow these straightforward steps:

1. Prepare the Slow Cooker: Lightly grease the inside of the slow cooker with cooking spray or olive oil.
2. Add the Chicken: Place the boneless, skinless chicken breasts into the slow cooker.
3. Mix the Sauces: In a mixing bowl, combine the onion soup mix, cream of chicken soup, chicken broth, and milk. Stir well until smooth.
4. Season: Add garlic powder, black pepper, and salt (if using). Mix until combined.
5. Pour the Mixture: Pour the sauce mixture over the chicken in the slow cooker, ensuring the chicken is well coated.
6. Cook: Cover and cook on low for 6-8 hours or on high for 3-4 hours, until the chicken is thoroughly cooked and tender.
7. Shred the Chicken: Once cooked, remove the chicken breasts from the slow cooker. Use two forks to shred the chicken into bite-sized pieces.
8. Thicken the Gravy (Optional): If you prefer a thicker gravy, mix 1-2 tablespoons cornstarch with a little water to create a slurry. Stir into the slow cooker and cook on high for an additional 15-30 minutes.
9. Return Chicken: After shredding, return the chicken to the gravy in the slow cooker and stir until well combined.

This method guarantees a beautifully flavored dish that is simple to prepare and even simpler to enjoy!