Preheat your oven to 400 degrees Fahrenheit. Lightly grease a 9×13 inch baking dish or drizzle with olive oil.
Set up your breading station with three shallow dishes. Place the flour in the first dish. Whisk the eggs in the second dish. In the third dish, combine the breadcrumbs, 1/2 cup Parmesan cheese, Italian seasoning, garlic powder, salt, and pepper.
Take one pounded chicken breast and dredge it completely in the flour, shaking off any excess. Dip it into the beaten egg, allowing excess to drip off. Finally, press the chicken firmly into the breadcrumb mixture to coat both sides evenly. Repeat with the remaining chicken breasts.
Place the breaded chicken breasts in a single layer on a rimmed baking sheet. Drizzle the tops lightly with the 2 tablespoons of olive oil.
Bake the chicken for 15 minutes.
Remove the baking sheet from the oven. Spoon about 1/4 cup of marinara sauce over the top of each chicken breast. Top each piece with slices of mozzarella cheese and a sprinkle of extra Parmesan cheese.
Return the chicken to the oven and bake for another 5 to 10 minutes, or until the cheese is melted, bubbly, and lightly golden, and the chicken reaches an internal temperature of 165 degrees Fahrenheit.
Let the chicken rest for 5 minutes before serving over pasta or with a side salad.
Notes
For a quicker cleanup, you can assemble the entire dish on one large sheet pan before baking.
If you prefer a crispier coating, you can briefly pan-fry the breaded chicken in a little oil for 2 minutes per side before topping with sauce and cheese and moving it to the oven.
Use high-quality jarred marinara sauce to keep this recipe fast and flavorful.