01 - Set oven to 375°F and allow to fully preheat.
02 - Pat chicken breasts dry using paper towels and arrange them in a greased 9x13-inch baking dish.
03 - In a medium mixing bowl, blend Caesar dressing, sour cream, garlic powder, salt, and black pepper until fully incorporated.
04 - Evenly spread the prepared sauce over the chicken breasts, covering each piece thoroughly.
05 - Sprinkle grated parmesan cheese across the sauced chicken breasts.
06 - Bake uncovered for 25 to 30 minutes until the chicken reaches an internal temperature of 165°F.
07 - Remove baking dish from oven, allow chicken to rest for 5 minutes, and top with chopped fresh parsley if desired.
08 - Serve hot accompanied by complementary side dishes as preferred.