Place chicken breasts in a resealable bag or shallow bowl and cover with dill pickle brine; marinate in the refrigerator for at least 30 minutes.
Preheat the oven to 400 degrees Fahrenheit (204 degrees Celsius) and line a baking sheet with parchment paper or a wire rack.
In a shallow dish, combine the grated parmesan cheese, panko breadcrumbs, dried dill, garlic powder, and black pepper.
Remove the chicken from the brine and pat thoroughly dry with paper towels to ensure a crispy crust.
Brush each chicken breast lightly with melted butter on all sides.
Dredge the chicken in the parmesan-panko mixture, pressing firmly to ensure the breading adheres to the surface.
Place the coated chicken onto the prepared baking sheet.
Bake for 18 to 22 minutes, or until the internal temperature reaches 165 degrees Fahrenheit (74 degrees Celsius) and the crust is golden brown.
Remove from oven and allow to rest for 5 minutes before topping with diced pickles and serving.