Step 1: Preheat the Oven

Preheat your oven to 400°F (200°C). Lightly grease a baking dish with a bit of olive oil or cooking spray to prevent sticking.

Step 2: Prepare the Butter Mixture

In a small bowl, whisk together the melted butter, olive oil, lemon juice, and minced garlic. This mixture will infuse the cod with a rich, tangy flavor.

Step 3: Season the Cod Fillets

Pat the cod fillets dry with paper towels to remove excess moisture. This helps the seasonings adhere better. Sprinkle both sides of the fillets with paprika, salt, black pepper, onion powder, oregano, and red pepper flakes if using.

Step 4: Arrange the Cod in the Baking Dish

Place the cod fillets in the greased baking dish. Pour the prepared butter mixture evenly over the fish, ensuring it coats each fillet well.

Step 5: Bake the Cod

Bake the cod for 12-15 minutes, depending on the thickness of the fillets. The fish should be opaque and easily flake with a fork when done. If using a food thermometer, the internal temperature should reach 145°F (63°C).

Step 6: Broil for Extra Flavor (Optional)

For a slightly golden, crispy top, switch the oven to broil and cook for an additional 2 minutes. Keep an eye on it to prevent burning.

Step 7: Garnish and Serve

Remove the baked cod from the oven and sprinkle with fresh parsley. Serve with lemon slices for an extra citrusy touch.