Preheat your oven to 200°C (390°F). Line a baking sheet with parchment paper or a silicone mat for easy cleanup.
Pound the chicken breasts to an even thickness of about 1/2 inch, ensuring they cook uniformly. Season both sides generously with salt, pepper, garlic powder, paprika, and thyme.
Set up your breading station: place beaten eggs in one shallow dish and mix the panko with Parmesan, if using, and additional seasonings in another.
Dip each chicken cutlet into the beaten eggs, allowing excess to drip off, then coat thoroughly in the seasoned breadcrumbs, pressing lightly to adhere.
Arrange the breaded cutlets on the prepared baking sheet, spacing them evenly. Drizzle or spray lightly with olive oil for a golden, crispy crust.
Bake in the preheated oven for 15–20 minutes, flipping halfway through, until the crust is golden brown and the internal temperature reaches 74°C (165°F).
Once baked, remove the chicken from the oven and let rest for 5 minutes. This helps the juices redistribute, keeping the meat moist.
Squeeze fresh lemon over the cutlets just before serving for a bright, fresh flavor. Serve hot alongside your favorite sides.