Southern blackened catfish tacos coat catfish fillets in a Cajun blackening spice blend (paprika, cayenne, thyme, garlic, onion), sear them in a screaming-hot cast-iron skillet at 500 °F until the spice rub blackens, then flake the fish into corn tortillas with slaw and a Cajun remoulade. The dish merges Southern Cajun blackened-fish technique (Paul Prudhomme, 1980s) with the Mexican taco format. A single batch yields 12 tacos in 25 minutes total time, with 10 minutes of prep, 6 minutes of searing, and 9 minutes of assembly. The catfish-to-tortilla ratio runs 1.5 lb fillets to 12 corn tortillas at 2 oz fish per taco. [Order seafood-style tacos at Taco Pros](../../tacos/) — fresh fish-taco preparation. ## What Are Southern Blackened Catfish Tacos Southern blackened catfish tacos are a Cajun-Mexican fusion taco using catfish fillets coated in a paprika-cayenne-thyme spice rub and seared on cast iron at 500 °F until the surface chars black. The defining attributes are catfish fillet, Cajun blackening spice blend, screaming-hot cast-iron sear, and corn tortilla service. The blackening technique was invented by Chef Paul Prudhomme at K-Paul's Louisiana Kitchen in New Orleans, in the early 1980s. Prudhomme originally blackened redfish; the technique spread to catfish, snapper, and other firm-fleshed white fish through the 1980s and 1990s. The taco format adaptation reached US Southern-Mexican fusion menus around 2010. The dish suits 4 use cases: Cajun-Mexican fusion menus, Southern-themed dinner parties, mid-week protein swaps for fish tacos, and game-day fish alternatives. Authentic Southern blackened catfish tacos retain four traits: catfish fillet (firm, mild flavor), Cajun blackening spices, cast-iron skillet at 500 °F, and a corn tortilla format with slaw counterpoint. ## Ingredients The recipe uses 1.5 lb catfish, 9-component Cajun blackening spice blend, and a classic Southern slaw. The list below covers exact quantities for 12 tacos. ### For the catfish - 1.5 lb catfish fillets (4 fillets, 6 oz each) - 3 tablespoons unsalted butter (melted) - 2 tablespoons neutral oil ### For the Cajun blackening spice blend - 2 tablespoons smoked paprika - 1 tablespoon dried thyme - 2 teaspoons garlic powder - 2 teaspoons onion powder - 1 teaspoon cayenne pepper (1/2 teaspoon for milder) - 1 teaspoon dried oregano - 1 teaspoon ground black pepper - 1 teaspoon ground white pepper - 1.5 teaspoons kosher salt ### For the Southern slaw - 4 cups green cabbage (1/8-inch shredded) - 1 cup red cabbage (1/8-inch shredded) - 1/4 cup mayonnaise - 2 tablespoons apple cider vinegar - 1 tablespoon Dijon mustard - 1 tablespoon sugar - 1/2 teaspoon kosher salt - 1/4 teaspoon black pepper ### For the Cajun remoulade - 1/2 cup mayonnaise - 1 tablespoon Dijon mustard - 1 tablespoon Creole mustard (or extra Dijon) - 1 tablespoon ketchup - 1 teaspoon hot sauce (Tabasco or Crystal) - 1 teaspoon lemon juice - 1 garlic clove (microplaned) - 1/2 teaspoon Cajun spice blend (reserved from rub) - 1 tablespoon parsley (chopped) ### For assembly (12 tacos) - 12 corn tortillas (6-inch) - 4 limes (cut in wedges) - 2 green onions (sliced thin, optional) - 1/2 cup pickled jalapeños (optional) The cast-iron skillet is non-negotiable. Stainless steel and non-stick cannot reach the 500 °F surface temperature needed to blacken the spice rub without burning the fish through. ## Equipment The recipe needs 3 pieces of equipment, all standard. - 1 large cast-iron skillet (12-inch, well-seasoned) - 1 mixing bowl for slaw - 1 small bowl for remoulade A proper exhaust fan and open windows are mandatory — blackening at 500 °F produces visible smoke. Apartment kitchens with poor ventilation should consider outdoor cooking on a propane burner. ## How to Make Southern Blackened Catfish Tacos The method runs in 4 stages: build the slaw and remoulade, season the catfish, blacken at high heat, assemble. Total active time is 25 minutes. ### Stage 1 — Build the Southern slaw and Cajun remoulade (5 minutes) Combine green and red cabbage in a bowl. Whisk mayonnaise, vinegar, Dijon, sugar, salt, and pepper. Pour over cabbage. Toss for 30 seconds. Rest 10 minutes while fish cooks. For the remoulade: whisk mayo, Dijon, Creole mustard, ketchup, hot sauce, lemon juice, microplaned garlic, 1/2 teaspoon spice blend, and parsley until smooth. Yields approximately 3/4 cup. ### Stage 2 — Season the catfish (3 minutes) Combine paprika, thyme, garlic powder, onion powder, cayenne, oregano, black pepper, white pepper, and 1.5 teaspoons salt in a bowl. Reserve 1/2 teaspoon for the remoulade. Pat the catfish fillets dry. Brush each fillet with melted butter. Press a heavy coat of spice blend onto both sides of each fillet — approximately 1.5 tablespoons per fillet. The heavy coat is structural — blackening produces a dark crust that protects the fish underneath. Skimping on the spice rub produces gray, under-flavored fish. ### Stage 3 — Blacken at high heat (6 minutes) Heat the cast-iron skillet over high heat for 8 minutes until smoking hot (500 °F surface). Add 2 tablespoons neutral oil and let it shimmer for 30 seconds. Lay the spiced catfish fillets in the skillet. Cook 3 minutes per side without moving. The spice crust will char black — this is the visual cue for proper blackening. The 8-minute preheat is mandatory. Skipping it produces under-charred fish with raw spice flavor. ### Stage 4 — Flake and assemble (5 minutes) Transfer the blackened catfish to a cutting board. Rest 2 minutes. Flake into 1.5-inch chunks. Warm 12 corn tortillas on a comal for 20 seconds per side. Fill each with 1/3 cup slaw, 2 oz catfish chunks, and 1 tablespoon Cajun remoulade. Top with green onion and pickled jalapeños. Serve with lime wedges. ## How to Serve Serve 3 tacos per person with 1 lime wedge, 1 tablespoon extra remoulade, 1 tablespoon extra slaw, and 2 pickled jalapeño slices per plate. Authentic Southern service plates the tacos with hush puppies or dirty rice on the side. ## Variations Three documented variations alter the recipe meaningfully. - Blackened tilapia tacos — uses tilapia in place of catfish. Same blackening spice and method; tilapia has a milder flavor. - Blackened mahi mahi tacos — uses firmer, more flavorful mahi mahi. Premium variant. - Air fryer blackened catfish tacos — air fry at 400 °F for 8 minutes. Reduces smoke and oil; sacrifices 25% of the deep blackened crust character. A milder version reduces cayenne to 1/2 teaspoon and adds 1 teaspoon brown sugar to the spice rub for a sweet-savory balance. ## Storage and Reheating Store cooked catfish separately from slaw, remoulade, and tortillas for 2 days refrigerated. Reheat in a 400 °F oven for 4 minutes to restore the blackened crust. Microwave reheating produces a soggy crust — skip it. The slaw and remoulade keep 2 days refrigerated. ## Nutrition (per 1 taco) Attribute Value Calories 245 kcal Protein 14 g Total fat 14 g Saturated fat 4 g Carbohydrates 16 g Sodium 540 mg Fiber 2 g