Preheat your oven to 400°F (200°C).
Line a large baking sheet with parchment paper or aluminum foil and spray with cooking oil or drizzle with olive oil.
Set up your breading station with three shallow dishes: one with flour mixed with salt and pepper, one with whisked eggs, and one with panko breadcrumbs mixed with Parmesan cheese, Italian seasoning, garlic powder, and onion powder.
Pat the chicken dry with paper towels.
If the chicken breasts are thick, slice them horizontally to create thinner cutlets and pound them to an even thickness of about ¼ to ½ inch.
Dredge each chicken cutlet in the flour mixture, then dip in the egg wash, and finally coat with the panko breadcrumb mixture.
Place the breaded chicken cutlets on the prepared baking sheet, ensuring they are not overlapping.
Bake the chicken for 15-20 minutes until golden brown and mostly cooked through.
While the chicken is baking, warm the marinara sauce in a small saucepan over low heat.
Remove the chicken from the oven and spoon 2-3 tablespoons of marinara sauce over each cutlet.
Sprinkle about ¼ cup of mozzarella cheese over the sauce on each cutlet and dust with extra Parmesan cheese.
Return the baking sheet to the oven and bake for an additional 8-12 minutes until the cheese is melted and bubbly.
Let the chicken rest for 2-3 minutes before serving.
Garnish with fresh chopped parsley or basil and serve immediately.