Preheat the oven to 375°F (190°C).
In a mixing bowl, combine 1/2 cup melted unsalted butter, 4 cloves minced garlic, 2 tablespoons chopped fresh parsley, 1 teaspoon freshly squeezed lemon juice, 1/2 teaspoon salt, and 1/4 teaspoon black pepper. Whisk until well combined.
Place 4 skin-on or skinless salmon fillets in a baking dish and pour the garlic butter sauce over the top, making sure each fillet is well coated.
Bake in the preheated oven for 15-20 minutes until the salmon flakes easily with a fork and turns a lovely golden color on top.
Serve your Garlic Butter Baked Salmon hot, garnished with additional parsley if desired.