01 - Preheat the oven to 375°F (190°C).
02 - Pat chicken breasts dry with paper towels and arrange in a greased 9x13-inch baking dish.
03 - Combine Caesar dressing, sour cream, garlic powder, salt, and black pepper in a medium mixing bowl. Stir until completely smooth.
04 - Spread the prepared sauce evenly over the chicken breasts.
05 - Sprinkle grated parmesan cheese over the sauced chicken.
06 - Bake uncovered for 25 to 30 minutes, or until the chicken reaches an internal temperature of 165°F (74°C).
07 - Remove from oven and allow to rest for 5 minutes. Garnish with chopped fresh parsley if desired.
08 - Serve hot accompanied by your choice of sides.