Southern Blackened Catfish Tacos Recipe

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 — 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)