Place the chicken breasts in a single layer in the slow cooker and season with salt and pepper.
Whisk together the cream of chicken soup, sour cream, chicken broth, garlic powder, onion powder, and Italian seasoning.
Pour the creamy sauce evenly over the chicken.
Toss the stuffing mix with melted butter and spread it over the sauce without stirring.
Cover and cook on high for 3 to 4 hours or on low for 6 to 7 hours, until the chicken reaches 165 degrees Fahrenheit.
Gently stir before serving and garnish with parsley if desired.