01 - Preheat oven to 375°F. Lightly grease a 9x13 inch baking dish.
02 - Pat chicken breasts dry and season both sides with salt and black pepper. Arrange in prepared baking dish.
03 - In medium bowl, mix mayonnaise (or Greek yogurt), 1/2 cup Parmesan, garlic powder, onion powder, paprika, and dried parsley until fully combined.
04 - Evenly spread sauce mixture over tops of chicken breasts, covering completely.
05 - Sprinkle with remaining 1/4 cup Parmesan cheese and breadcrumbs if using.
06 - Bake uncovered for 25-30 minutes until chicken reaches internal temperature of 165°F and top is golden and bubbly.
07 - Let rest for 5 minutes before serving. Garnish with extra parsley if desired.