01 - Preheat the oven to 400°F. Lightly grease a baking dish large enough to hold the cod fillets in a single layer.
02 - Pat the cod fillets dry with paper towels and place them in the prepared baking dish.
03 - In a small bowl, whisk together the melted butter, lemon juice, lemon zest, minced garlic, parsley, salt, and pepper.
04 - Pour the lemon butter sauce evenly over the cod fillets.
05 - Bake for 16–18 minutes, or until the fish flakes easily with a fork and turns opaque.
06 - Optionally, garnish with lemon slices and a sprinkle of fresh parsley before serving.