In a skillet, heat the olive oil over medium-high heat. Season each chicken breast generously on both sides with salt, pepper, garlic powder, and onion powder. Add the chicken to the skillet and sear for about 2-3 minutes per side, or until lightly browned.
In the bowl of your slow cooker, whisk together the chicken broth, cream of mushroom soup, and onion soup mix until the mixture is smooth and evenly combined.
Carefully place the seared chicken breasts into the gravy mixture in the crockpot, ensuring each piece is coated in the sauce.
Cover the slow cooker with its lid and set it to cook on low for 6-7 hours or on high for 3-4 hours.
Once the cooking time is complete, use two forks to shred the chicken directly in the crockpot. Stir the chicken into the gravy for a well-combined, thick consistency.
Before serving, taste the chicken and gravy mixture and adjust seasoning with additional salt and pepper if needed.
Spoon the savory chicken and gravy over a generous portion of cooked rice or creamy mashed potatoes for a comforting meal.
Finish with a sprinkle of freshly chopped parsley on top to add a bright pop of color and freshness.