Preheat the oven to 425°F (220°C).
Pat the chicken breasts dry with paper towels. If they are thick, pound them to an even thickness for even cooking.
In a small bowl, combine the paprika, garlic powder, onion powder, Italian seasoning, salt, black pepper, and smoked paprika.
Rub the chicken breasts with olive oil, then coat evenly with the seasoning mixture.
Place the chicken in a lightly greased baking dish or on a parchment-lined baking sheet.
Brush with melted butter if using.
Bake for 18 to 22 minutes, depending on the thickness of the chicken, until the internal temperature reaches 165°F (74°C).
Remove the chicken from the oven and let it rest for 5 minutes before slicing.
Garnish with chopped parsley and serve with lemon wedges if desired.