01 - Preheat your oven to 400°F. Line a baking sheet with parchment paper or lightly grease a suitable baking dish to prevent sticking.
02 - Gently pat the cod fillets dry using paper towels. Arrange them on the prepared baking surface. Drizzle each fillet evenly with olive oil, then season both sides generously with salt and freshly ground black pepper.
03 - In a small mixing bowl, combine the softened unsalted butter with the finely chopped parsley, dill, and chives. Incorporate the minced garlic, lemon zest, lemon juice, 1/2 teaspoon of salt, and 1/4 teaspoon of freshly ground black pepper. Mix thoroughly until all ingredients are well blended and fragrant.
04 - Evenly spread approximately half of the prepared lemon herb butter over the top surface of the cod fillets. Reserve the remaining butter for serving as a finishing touch.
05 - Transfer the baking sheet to the preheated oven and bake for 12 to 15 minutes, or until the cod appears opaque throughout and flakes effortlessly with a fork. Take care to avoid overcooking to maintain optimal moisture.
06 - Carefully remove the baked cod from the oven and transfer each fillet to individual serving plates. Top each piece of cod with a generous dollop of the reserved lemon herb butter. Serve immediately for best enjoyment.