Prep the slow cooker: Lightly spray the crock with cooking spray to help prevent sticking and make cleanup easier.
Season the chicken: Pat the chicken dry and sprinkle both sides with garlic powder, onion powder, and black pepper. You can add a pinch of salt if using low-sodium ingredients, but be mindful of the stuffing’s salt content.
Layer the aromatics (optional): If using onion, celery, or mushrooms, scatter them in an even layer on the bottom of the slow cooker.
This adds flavor and moisture.
Add the chicken: Lay the chicken pieces in a single layer on top of the veggies (or directly in the crock if not using veggies).
Mix the sauce: In a bowl, whisk together the cream of chicken soup, chicken broth, and sour cream (if using) until smooth. Stir in the melted butter for added richness.
Pour and top: Pour the sauce over the chicken. Sprinkle the dry stuffing mix evenly over the top.
Do not stir.
Cook: Cover and cook on Low for 4 to 6 hours or High for 2.5 to 3.5 hours, until the chicken is cooked through and tender. Internal temperature should reach 165°F (74°C).
Fluff and finish: If the top looks a bit dry, drizzle a few tablespoons of warm broth or water over the stuffing, then gently fluff it with a fork. Taste and adjust seasoning if needed.
Serve: Spoon chicken, stuffing, and sauce onto plates.
Garnish with chopped parsley or thyme for a fresh touch.