In a medium bowl, whisk together olive oil, garlic powder, salt, and pepper. Coat each chicken breast thoroughly with the marinade and let sit for 15 minutes.

In a large bowl, combine panko bread crumbs with grated Parmesan cheese. Mix well until the cheese is evenly distributed.

Preheat your oven's broiler on high. Dredge each marinated chicken breast in the panko-Parmesan mixture, pressing firmly to adhere.

Arrange the coated chicken breasts on a baking dish in a single layer. Broil for 6-8 minutes, flipping once, until crust is golden brown and internal temperature reaches 165°F (74°C).

Remove from the oven and let the chicken rest for about 5 minutes before serving.