01 - Preheat the oven to 400°F. Lightly grease a baking dish large enough to hold the fillets in a single layer.
02 - Pat haddock fillets dry using paper towels. Season both sides evenly with salt and black pepper. Arrange fillets in the prepared baking dish.
03 - In a small mixing bowl, whisk together melted butter, lemon juice, lemon zest, capers, parsley, and minced garlic until well blended.
04 - Pour the lemon-caper butter mixture evenly over the haddock fillets, ensuring full coverage.
05 - Bake in the preheated oven for 15 to 18 minutes, or until the fish is opaque and flakes easily with a fork.
06 - Remove from oven, let rest for 2 minutes. Garnish with lemon wedges and additional parsley as desired. Serve immediately.