01 - Preheat the oven to 375°F. Lightly grease a 9x13-inch baking dish with cooking spray or a small amount of oil.
02 - Pat the chicken breasts completely dry with paper towels and arrange them in a single layer in the prepared baking dish, ensuring pieces don't overlap.
03 - In a medium bowl, whisk together the mayonnaise, parmesan cheese, garlic powder, onion powder, black pepper, salt, and Italian herbs (if using) until a smooth, well-combined mixture forms.
04 - Spread the creamy mixture evenly over the top of each chicken breast, using a spoon or spatula to completely cover the surface area.
05 - Bake for 25-30 minutes until the chicken is cooked through and reaches an internal temperature of 165°F, and the coating is golden brown and bubbly.
06 - For extra browning and a crispy top, switch the oven to broil and cook for an additional 2-3 minutes, watching closely to prevent burning.
07 - Remove the chicken from the oven and let it rest for 5 minutes to allow juices to redistribute. Sprinkle with chopped fresh parsley before serving.