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Why This Recipe Works
- Double-dredge: A light buttermilk bath followed by seasoned cornmeal creates shatter-crisp crust that clings to every flake.
- Hot-hot oil: Maintaining 350 °F guarantees quick cooking, locking in moisture and preventing greasiness.
- Homemade remoulade: Tangy, creamy, slightly spicy—this sauce can be prepped days ahead and tastes better as the flavors meld.
- Fresh lemon finish: A bright squeeze just before serving balances the rich fry and makes the cornmeal crust sing.
- Make-ahead friendly: Season the fish, mix the sauce, and set up your breading station hours before guests arrive.
- Feeds a crowd: One large skillet cooks 6–8 fillets in minutes; keep them warm in the oven while you fry the next batch.
Ingredients You'll Need
Great catfish starts with great fish. Look for U.S. farm-raised fillets that are moist, translucent, and free of “muddy” smell—freshwater catfish should smell like a clean pond, not a dirty boot. I prefer medium fillets (6–7 oz each) because they cook evenly and stay juicy. If you only find thin tails, reduce frying time by 30 seconds per side.
For the breading, plain yellow cornmeal delivers the classic Southern crunch. Do not swap in polenta; the grains are too coarse and will burn before the fish cooks. A 50/50 mix of fine cornmeal and stone-ground gives restaurant texture—delicate but with pleasant grit. Adding a touch of masa harina deepens the corn flavor and helps the crust brown faster thanks to its natural sugars.
Buttermilk is non-negotiable. Its gentle acidity tenderizes the catfish while the thick liquid gives the cornmeal something to cling to. In a pinch, whisk Âľ cup milk with 2 tsp lemon juice and let stand 5 minutes. Spice-wise, smoked paprika adds campfire depth, cayenne brings controlled heat, and a whisper of dried thyme evokes classic Tennessee seasoning.
The remoulade is a Creole cousin to tartar sauce. Start with good mayo—Duke’s if you’re brand-loyal—and build layers: grainy Creole mustard for bite, ketchup for subtle sweetness, horseradish for nose-tingling heat, and a dash of Worcestershire for umami. Finely minced celery and scallion add crunch; lemon juice and Louisiana hot sauce brighten everything. Make it at least two hours ahead so the flavors marry; overnight is even better.
How to Make Southern Fried Catfish Fillets with Remoulade
Make the remoulade first
In a medium bowl whisk ¾ cup mayonnaise, 2 Tbsp Creole mustard, 1 Tbsp ketchup, 1 Tbsp prepared horseradish, 2 tsp lemon juice, 1 tsp Worcestershire, 1 tsp Louisiana hot sauce, 1 minced scallion, 1 minced celery rib, 1 minced garlic clove, ½ tsp smoked paprika, and a pinch of salt. Cover and refrigerate at least 2 hours or up to 5 days.
Season the catfish
Pat 6 catfish fillets dry with paper towels. Combine 1 tsp kosher salt, ½ tsp black pepper, ½ tsp garlic powder, and ¼ tsp cayenne. Sprinkle both sides of the fillets, pressing gently so the spices adhere. Let stand 10 minutes while you set up the breading station.
Build the breading line
In a shallow dish pour 1½ cups buttermilk. In a second dish whisk 1 cup fine yellow cornmeal, ½ cup stone-ground cornmeal, 3 Tbsp all-purpose flour, 1 Tbsp cornstarch (for extra crunch), 1½ tsp kosher salt, 1 tsp smoked paprika, ½ tsp dried thyme, ½ tsp onion powder, and ¼ tsp cayenne. Place a clean wire rack over a rimmed sheet pan.
Heat the oil
Pour 1½ inches peanut oil (about 3 cups) into a heavy 12-inch cast-iron skillet. Clip on a candy thermometer and heat over medium-high until the temperature reaches 350 °F (177 °C). Maintain this temperature; if the oil drops below 325 °F the crust will absorb fat and turn soggy.
Dredge the fillets
Working with one piece at a time, dip the seasoned catfish into the buttermilk, letting excess drip back into the dish. Transfer to the cornmeal mixture, pressing firmly to coat every nook. Gently shake off excess and place on the wire rack. Repeat; allow the breaded fillets to rest 5 minutes—this helps the crust set.
Fry in batches
Fry 2–3 fillets at a time, depending on skillet size. Lower them away from you to prevent splatter. Cook 2½–3 minutes per side for medium fillets, until deep golden and internal temperature reaches 145 °F (63 °C). Adjust burner as needed to keep oil between 340–360 °F.
Drain & keep warm
Using a spider or slotted spatula, transfer fillets to a fresh wire rack set over paper towels. Hold in a 200 °F oven if frying multiple rounds. Let oil return to 350 °F between batches.
Serve hot with remoulade
Plate the catfish on a platter lined with brown paper or fresh lettuce leaves. Garnish with lemon wedges and chopped parsley. Spoon remoulade into ramekins or drizzle over the top. Serve immediately alongside coleslaw, hush puppies, and iced tea.
Expert Tips
Oil temp is everything
Clip a thermometer to the side of your skillet and adjust the burner constantly. If the oil creeps past 370 °F the cornmeal will scorch; below 325 °F the crust absorbs oil and turns heavy.
Rest on rack, not paper
Wire racks allow air circulation so steam escapes, keeping the underside crisp. Paper towels trap moisture and can soften your beautiful crust.
Reuse your oil smartly
Cool, strain through cheesecloth, and store in a sealed jar in the dark for up to 3 more fries. Add ÂĽ fresh oil each time to keep flavor neutral.
Overnight flavor boost
Season the fillets and refrigerate uncovered overnight; the surface will dry slightly, helping the breading adhere and fry up extra crisp.
Even thickness matters
If one end of a fillet is dramatically thinner, fold a small piece of parchment under the thick side before breading so it cooks evenly.
Cast-iron bonus
Iron retains heat better than stainless, so the oil recovers temperature quickly after adding fish, giving you a lighter, crunchier crust.
Variations to Try
- Cornmeal-Crusted Shrimp: Replace catfish with 16–20 count shrimp, peeled and deveined. Fry 90 seconds per side and serve with remoulade for po-boy sandwiches.
- Blackened Style: Skip the breading, coat seasoned fillets with melted butter, then press into a spicy mix of smoked paprika, thyme, oregano, and cayenne. Sear in a dry cast-iron skillet 2 minutes per side.
- Gluten-Free: Replace all-purpose flour with rice flour and use certified gluten-free cornmeal. The texture is identical.
- Hot-Honey Drizzle: Whisk 2 Tbsp honey with 1 tsp hot sauce and drizzle over the fried fillets just before serving for sweet heat.
- Panko-Crusted: Substitute 1 cup panko for the stone-ground cornmeal; crush lightly for airy crunch. Kids love the milder flavor.
- Air-Fryer: Spray breaded fillets with oil, arrange in a single layer, and cook at 400 °F for 10–11 minutes, flipping halfway. The crust is crisp but lighter.
Storage Tips
Leftovers: Cool completely, then refrigerate in an airtight container up to 2 days. Reheat on a wire rack set over a sheet pan in a 400 °F oven for 8–10 minutes; avoid the microwave or the crust will steam and toughen.
Freezer: Flash-freeze cooked fillets on a parchment-lined sheet until solid, then transfer to a zip-top bag with parchment between layers for up to 1 month. Reheat directly from frozen at 425 °F for 15 minutes, flipping halfway.
Remoulade: Keeps 5 days refrigerated in a sealed jar. The flavors intensify, so taste and adjust salt or lemon before serving leftovers.
Frequently Asked Questions
Southern Fried Catfish Fillets with Remoulade
Ingredients
Instructions
- Make remoulade: Whisk mayonnaise, Creole mustard, ketchup, horseradish, lemon juice, Worcestershire, hot sauce, scallion, celery, garlic, paprika, and salt. Chill 2 h minimum.
- Season: Pat catfish dry. Combine 1 tsp salt, pepper, garlic powder, and cayenne; sprinkle on both sides. Rest 10 min.
- Set station: Place buttermilk in one dish. In another combine both cornmeals, flour, cornstarch, 1½ tsp salt, paprika, thyme, onion powder, and cayenne.
- Heat oil: In a 12-inch cast-iron skillet heat 1½ inches peanut oil to 350 °F.
- Bread: Dip fillets in buttermilk, then press into cornmeal mixture; shake off excess and set on a rack.
- Fry: Fry 2–3 fillets at a time, 2½–3 min per side until golden and internal temp hits 145 °F. Drain on rack.
- Serve: Plate immediately with lemon wedges, parsley, and cold remoulade.
Recipe Notes
Maintain oil temperature between 340–360 °F for the crispiest, least greasy fish. Adjust burner as needed and allow oil to return to 350 °F between batches.
