Prepare and Flour Cod:

If possible, allow the cod to rest at room temperature for about 15 minutes before beginning. Slice into 4 equal portions. Sprinkle each with salt and pepper, then dust with flour, tapping off excess.

Sear Cod in Butter:

Place 2 tablespoons of butter in a skillet over medium-high heat. Heat the pan for several minutes. Once hot, add the cod and sear for 2 minutes on each side. Using a spatula, transfer the fish to a plate (it is delicate and may break).

Cool Skillet Briefly:

Remove the skillet from the heat for about a minute to let it cool slightly.

Make Garlic Roux:

Return the skillet to medium heat and add the remaining butter. Once melted, add the garlic and 1/2 tablespoon flour, stirring constantly for about 1 minute.

Create Cream Sauce:

Pour in the cream, lemon juice, and Italian seasoning. Deglaze the pan by scraping up any browned bits. Cook for 2-3 minutes.

Add Parmesan and Parsley:

Mix in the grated parmesan and chopped parsley until combined.

Finish Cod in Sauce:

Return the cod to the skillet and cook for a few more minutes until it flakes easily with a fork, being cautious not to overcook, especially if the pieces are thin. Spoon sauce over the fish and adjust seasoning with additional salt and pepper if desired.