Preheat your oven to 375°F (190°C).
Rinse the chicken breasts and pat them dry. Place them in a single layer in a baking dish.
In a bowl, combine the mayonnaise (or yogurt), Parmesan cheese, black pepper, seasoning salt, and garlic powder. Mix well.
Spread the mixture evenly over the chicken breasts.
Bake for 25-30 minutes, or until the chicken is cooked through (165°F internal temperature) and the coating is golden brown.
Let the chicken rest for a few minutes before serving. Enjoy!