Preheat oven to 350F (180C).
Season fish with garlic powder, salt and pepper, to taste. Set aside.
1 ½ lbs. cod, ½ teaspoon garlic powder, Salt and pepper
Pour oil into a large oven-proof skillet to coat the bottom of the pan (about 2 tablespoons). Heat over medium heat. Add butter, let it melt.
2 tablespoons olive oil, 2 tablespoons butter
Place fish in the oil and butter, skin side down. Cook until bottom is lightly browned (about 3-4 minutes).
Use a spatula to gently turn the fish over.
Place skillet in the oven and bake for about 8 more minutes, or until fish is cooked through and flakes easily with a fork.
Garnish with a squeeze of fresh lemon juice, sprinkle with chopped fresh herbs, and serve.
1 lemon, Optional garnish: fresh herbs