Preheat oven: Set to 400°F and lightly oil a cast iron or oven-safe skillet.
Make the lemon butter sauce: Whisk together lemon juice, 2 tablespoons olive oil, and melted butter in a small bowl. Set the minced garlic aside for now.
4 tablespoon lemon juice, 2 tablespoon butter, 2 tablespoon olive oil
Mix the coating: In another bowl, stir together breadcrumbs, parmesan, flour, paprika, garlic powder, salt, pepper, and parsley.
½ cup breadcrumbs, ½ teaspoon salt, 2 tablespoon flour, ⅛ teaspoon black pepper, ½ teaspoon garlic powder, ⅓ cup parmesan, 4 tablespoon parsley, 1 teaspoon paprika
Coat the fish: Pat the cod fillets dry. Dip each one into the lemon butter sauce, then into the breadcrumb mixture, pressing gently to coat. Shake off the excess.
5 cod fillets
Add to skillet: Pour the remaining lemon butter sauce into the skillet and stir in garlic. Place the coated cod fillets into the pan.
4 teaspoon garlic
Bake: Bake for 10 minutes, then switch to broil for the last 2 minutes to get the crust golden and crisp.
Serve: Spoon some of the lemon-garlic sauce from the pan over each fillet. Serve warm.