Blackened Catfish Po'boy
A classic New Orleans sandwich loaded with boldly spiced, pan-seared catfish fillets that develop a dark, flavorful crust. Served on crusty French bread with crisp lettuce, juicy tomatoes, and a tangy remoulade sauce that cuts through the richness. Ready in under 30 minutes and tastes like a trip to the French Quarter.
For 4 servings
- prep · ~5 min
Make the remoulade sauce.
1.In a small bowl, combine mayonnaise, Dijon mustard, lemon juice, hot sauce, chopped capers, minced garlic, and paprika.2.Whisk until smooth and well blended.3.Cover and refrigerate until ready to assemble sandwiches.TIPMaking the remoulade ahead lets the flavors meld — even 15 minutes in the fridge makes a difference. - prep · ~2 min
Mix the blackening spice blend.
1.In a small bowl, combine smoked paprika, garlic powder, onion powder, dried thyme, dried oregano, cayenne pepper, salt, and black pepper.2.Stir until evenly mixed. - prep · ~5 min
Prepare the catfish fillets.
1.Pat each catfish fillet extremely dry with paper towels — surface moisture is the enemy of a good blackened crust.2.Brush both sides of each fillet generously with melted butter.3.Coat both sides evenly with the blackening spice blend, pressing gently so the spices adhere.TIPDon't let the seasoned fillets sit long — the salt will draw out moisture. Season right before they hit the pan. - fry · ~7 min
Blacken the catfish in a ripping-hot skillet.
1.Place a cast iron skillet over high heat and add the oil. Heat until the oil is shimmering and just beginning to smoke.2.Carefully lay the catfish fillets in the pan, presentation-side down. Work in batches if needed to avoid crowding.3.Sear without moving for 2 to 3 minutes, until a deep, dark brown-black crust forms.4.Flip carefully with tongs and cook the second side for another 2 to 3 minutes, until the fish flakes easily with a fork and reaches 145°F internal temperature.5.Transfer cooked fillets to a wire rack or plate.TIPTurn on your kitchen exhaust fan and open a window — proper blackening creates smoke. A cast iron skillet is non-negotiable for the intense, even heat. - prep · ~2 min
Warm and split the French bread.
Slice the French bread loaf into 4 equal portions, then split each portion lengthwise without cutting all the way through. If desired, lightly toast the cut sides in a dry pan or under the broiler for 1 minute.
TIPA crisp, lightly toasted interior helps the bread stand up to the juicy fish and remoulade without getting soggy. - assemble · ~3 min
Assemble the po'boys.
1.Spread a generous spoonful of remoulade sauce on both sides of each bread piece.2.Place a blackened catfish fillet on the bottom half of each sandwich.3.Top with shredded lettuce, 2 slices of tomato, and pickle rounds.4.Close the sandwich and press down gently. - serve
Serve immediately with extra hot sauce on the side.
What to keep in mind.
7 tips from the recipe — small details that make a real difference to the final dish.
- 1Pat the catfish fillets extremely dry before buttering—any surface moisture creates steam instead of a crispy blackened crust.
- 2Use a well-seasoned cast iron skillet for blackening; it delivers the intense, even heat needed to char the spices without burning the fish.
- 3Work in batches to avoid crowding the pan—overcrowding drops the pan temperature and steams the fish instead of searing it.
- 4Don't let the seasoned fillets sit longer than a few minutes before cooking; the salt in the spice rub will draw out moisture and dull the crust.
- 5Turn on your kitchen exhaust fan and open a window—proper blackening produces smoke, which is part of the authentic process.
- 6Toast the cut sides of the French bread lightly before assembling to create a barrier that prevents sogginess from the remoulade and juicy fish.
- 7Leftover blackened catfish can be stored in an airtight container in the fridge for up to 2 days; reheat in a hot skillet to revive the crust.
Adapt it for your goals.
Lighter remoulade
Replace half the mayonnaise with Greek yogurt or plain full-fat yogurt for a tangier, lower-calorie sauce that still provides creaminess.
grilled catfish po'boyGrilled catfish po'boy
For a less smoky option, grill the seasoned catfish fillets on a hot oiled grill grate over direct high heat for 3-4 minutes per side instead of pan-searing.
extra crunchy breadingExtra-crunchy breading
After brushing with butter, lightly dredge the fillets in fine cornmeal or panko breadcrumbs before applying the spice rub for a crisper, crunchier exterior.
spice level adjustmentSpice level adjustment
For a milder version, reduce the cayenne to a pinch or omit it entirely; add a teaspoon of sweet paprika for color instead of extra heat.
gluten free optionGluten-free option
Serve the blackened catfish over a bed of crisp lettuce or in gluten-free buns; skip the French bread and use a gluten-free wrap or sturdy lettuce leaves.
Why this is on our healthy list.
Rich in Lean Protein
Catfish is an excellent source of high-quality, low-fat protein that supports muscle maintenance and satiety.
Good Source of Omega-3s
Catfish provides omega-3 fatty acids, which are beneficial for heart and brain health when part of a balanced diet.
Antioxidant-Rich Spices
Smoked paprika, thyme, and oregano contribute antioxidants and anti-inflammatory compounds that support overall wellness.
Low in Carbohydrates
The blackened catfish itself is naturally low in carbs, making this sandwich (without the bread) suitable for low-carb meal plans.
Frequently asked questions
Yes, firm white fish like redfish, snapper, or grouper work well. Avoid thin or flaky fish (like tilapia) which may overcook before the crust forms.
