The secret to adding flavor to this chicken stew is in the ranch dressing mix. One packet con tains a blend of spices like garlic powder, dry buttermilk, onion powder, and more that make the stew extra creamy.
In a 6-quart slow cooker, combine the chicken breasts, onion, potatoes, carrots, and celery. Season with salt and pepper. Drizzle the melted butter over and stir to coat.
In a medium bowl, combine the soup, milk, sour cream, ranch dressing mix, and thyme. Pour the mixture into the slow cooker.
Cover and cook on High for 3 to 4 hours or on Low for 5 to 6 hours.
Ladle into bowls, garnish with parsley, and serve.
