Preheat oven to 375°F (190°C). Lightly grease a baking dish.
Mix coating: Combine mayonnaise, Parmesan, garlic powder, onion powder, paprika, salt, and pepper.
Prepare chicken: Place chicken breasts in dish. Spread mixture evenly over each piece.
Bake: Cook uncovered 25–30 minutes until golden and bubbly.
Garnish: Sprinkle with parsley and serve hot.
