Preheat your oven to 375°F (190°C).
In a small bowl, mix together the mayonnaise, shredded parmesan cheese, garlic powder, seasoning salt, and black pepper until well combined.
Place the chicken breasts in a baking dish. Spread the parmesan-mayo mixture evenly over the chicken, covering each piece.
Bake the chicken for 40-45 minutes, or until the internal temperature of the chicken reaches 165°F (74°C). The top should be golden and slightly crispy.
Let the chicken rest for a few minutes before serving. Enjoy!
