Preheat your oven to 375°F (190°C).
In a mixing bowl, combine the mayonnaise, grated Parmesan cheese, garlic powder, onion powder, Italian herbs, salt, and black pepper. Mix until well blended.
Place the chicken breasts in a baking dish. If they are thick, you may want to pound them to an even thickness for more uniform cooking.
Evenly spread the mayo-Parmesan mixture over the top of each chicken breast, ensuring they are thoroughly covered.
Bake in the preheated oven for about 30 minutes, or until the chicken is cooked through and reaches an internal temperature of 165°F (74°C) and the top is golden brown.
Remove from the oven and let it cool for a few minutes. Optional: garnish with chopped parsley before serving.
For a crispy topping, you can broil the chicken for an additional 2-3 minutes at the end of cooking, but keep an eye on it to avoid burning.
Serve with a side of vegetables, rice, or a salad for a complete meal.