01 - Preheat oven to 375°F.
02 - Pat chicken breasts dry with paper towels and arrange in a greased 9x13-inch baking dish.
03 - In a medium bowl, combine Caesar dressing, sour cream, garlic powder, salt, and black pepper until smooth.
04 - Spread the prepared sauce evenly over each chicken breast in the baking dish.
05 - Sprinkle grated parmesan cheese generously over the sauced chicken breasts.
06 - Bake uncovered for 25 to 30 minutes, or until chicken reaches an internal temperature of 165°F.
07 - Remove from oven and let rest for 5 minutes. Garnish with chopped fresh parsley, if desired.
08 - Serve hot with your preferred accompaniments.