Remove skin from fish and cut into filets. Season one side of the fish filets with blackening seasoning. Coat well.
Melt butter in microwave, and skim fats from butter with a spoon to make clarified butter.
Heat a heavy bottomed pan or cast iron skillet to medium heat, and then add clarified butter to pan.
Place fish seasoned side down, and cook about 5 minutes. Or, until you can see that filet has cooked half way. Turn the filets over and cook for about 5 more minutes or until fish is completely cooked.
Remove to plate, and let rest two minutes prior to serving.
Can be stored in an airtight container for up to two days.