Preheat Oven
Preheat oven to 375°F (190°C). Lightly grease a baking dish.
Make the Creamy Topping
In a bowl, mix mayonnaise (or Greek yogurt), Parmesan cheese, garlic powder, paprika, salt, and pepper until smooth.
Prepare the Chicken
Place chicken breasts in the baking dish and pat dry with paper towels.
Coat the Chicken
Spread the creamy mixture evenly over each chicken breast.
Bake
Bake uncovered for 35–40 minutes, or until chicken reaches an internal temperature of 165°F (74°C).
Rest & Serve
Let rest for 5 minutes before serving to retain juices.