Spray the crockpot with cooking spray.

Place the chicken breasts in the bottom of the crockpot and season with garlic powder, salt, and pepper.

Sprinkle the stuffing mix over the chicken.

In a bowl, mix the cream of chicken soup, sour cream, and chicken broth. Pour the mixture over the stuffing layer.

Add the frozen green beans on top.

Cook on low for 6–7 hours or high for 4 hours, until the thickest piece of chicken reaches 165°F.

Fluff the stuffing with a fork before serving.