Prepare and Cook the Chicken
Preheat your grill or a grill pan to medium-high heat.
Rub chicken breasts with olive oil and season with garlic powder, onion powder, paprika, salt, and pepper.
Grill the chicken for 5-7 minutes per side until fully cooked and the internal temperature reaches 165°F (74°C). Remove and set aside.
Make the Parmesan Crust
In a small bowl, combine panko breadcrumbs, grated Parmesan cheese, melted butter, and garlic powder. Mix well to form a crumbly topping.
Add the Topping
Preheat your oven broiler to high.
Place the cooked chicken breasts on a baking sheet.
Spread a layer of ranch dressing over each chicken breast. Sprinkle shredded Parmesan and mozzarella cheese evenly over the ranch.
Add the Parmesan Crust
Top each chicken breast with the prepared panko-Parmesan mixture, pressing lightly to adhere.
Broil and Serve
Place the chicken under the broiler for 2-3 minutes or until the topping is golden brown and bubbly. Watch closely to avoid burning.
Remove from the oven and serve hot.