Step 1: Prepare the Spice Mix

1. In a shallow bowl, combine kosher salt, black pepper, cayenne pepper, garlic powder, onion powder, paprika, parsley, oregano, and thyme.

Step 2: Coat the Catfish

1. Press the catfish fillets into the spice mixture, ensuring they are well coated on both sides.

Step 3: Melt the Butter

1. In a bowl, melt the butter and set aside. You will use some for cooking and some to drizzle over the finished catfish.

Step 4: Preheat Cast Iron Skillet

1. Heat a large cast-iron skillet on high heat (this dish produces a lot of smoke, so cooking outdoors or in a well-ventilated area is recommended). Pour about ¼ cup of melted butter into the skillet.

Step 5: Cook the Catfish

1. Once the butter in the skillet is smoking hot, lay the seasoned catfish fillets in the pan. Cook for about 3 minutes per side, or until the spices blacken and the fish becomes flaky and opaque.

Step 6: Serve

1. Once cooked, drizzle the remaining butter over the catfish fillets for added richness.