01 - Pat the cod fillets completely dry with paper towels. Season both sides generously with salt and pepper, pressing gently to help the seasoning adhere.
02 - Heat 2 tablespoons of butter in a large skillet over medium heat until melted and beginning to foam. Swirl to coat the pan evenly.
03 - Add the minced garlic to the melted butter. Sauté for exactly 30 seconds until fragrant and pale gold, watching carefully to prevent burning.
04 - Gently place the seasoned cod fillets in the skillet, being careful not to crowd the pan. Cook for 3 to 4 minutes on the first side until a golden crust forms.
05 - Carefully flip each fillet using a thin spatula. Add the remaining butter, lemon juice, and lemon zest to the pan. As the butter melts, tilt the skillet and continuously spoon the sauce over the fish for 3 to 4 minutes.
06 - Cook until the cod is completely opaque throughout and flakes easily when tested with a fork. Sprinkle with chopped parsley and remove from heat immediately. Serve while hot, spooning the remaining lemon garlic butter sauce over each fillet. Garnish with fresh lemon wedges if desired.