Preheat the Oven
Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish.
Prepare the Chicken
Place the chicken breasts in the prepared baking dish.
Make the Topping
In a mixing bowl, combine mayonnaise, Parmesan cheese, garlic powder, paprika, salt, and pepper. Mix until smooth.
Coat the Chicken
Spread the topping evenly over the chicken breasts, ensuring they are fully covered.
Bake
Bake uncovered for 25-30 minutes, or until the chicken reaches an internal temperature of 165°F (74°C) and the topping is golden and bubbly.
Rest and Garnish
Let the chicken rest for 5 minutes before serving. Garnish with fresh parsley or chives, if desired.