Step 1

Combine the garlic powder, onion powder, paprika, Italian seasoning, Old Bay, and cayenne pepper (optional) and mix.

Step 2

Lay the fish filets flat and sprinkle seasonings on the first side, lightly pat them in, and then sprinkle the remaining seasoning on the back side and pat in. This can sit in the refrigerator for up to an hour seasoned.

Step 3

Heat a large cast iron skillet over high heat for 2-3 minutes, then reduce to medium high and add the butter.

Step 4

Once the butter is melted and starting to brown, but not smoke, season the fish with salt and pepper to taste, then put it flat in the skillet. Do not crowd the skillet. Cook the fish in batches if necessary.

Step 5

Let the fish cook for 2-3 minutes on the first side without moving or checking it, then flip and cook 2-3 minutes on the other side, or until it reaches the desired doneness, or about 145˚F. Cooking time will vary depending on the size and thickness of your fish filets.

Step 6

Remove the fish from the skillet (to prevent it from continuing to cook) and serve warm with fresh parsley or lemon juice if desired.