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Cast-Iron Blackened Catfish with Potlikker-Braised Mustard Greens

Cast-Iron Blackened Catfish with Potlikker-Braised Mustard Greens

A lot of folks think blackening just means burning spices, but when done right in a screaming-hot cast-iron pan, it creates a deeply savory crust that locks in the sweet, delicate nature of the catfish. Growing up in Atlanta, my grandmama always fried her fish, but during my time in Charleston, I learned the magic of this high-heat technique. I serve it over silky mustard greens slow-simmered with smoked bacon and my signature splash of umami-rich fish sauce. This is elevated Southern comfort that honors the past while looking right into the future.

Marcus Stone
Marcus Stone
Prep: 15 minutes
Cook: 52 minutes
4
medium
dinner
southern-heritagecast-ironblackenedseafood+1

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Timeline

52 minutes
0m15m30m45m52m
Render Bacon & Onions
8m
Braise Mustard Greens
30m
Mix Blackening Spice
5m
Season Catfish
5m
Heat Cast Iron
5m
Blacken First Batch
6m
Blacken Second Batch
6m
Plate and Serve

Ingredients

  • 4 fillets (6 oz each) Catfish fillets(Pat dry before using)
  • 4 tbsp Unsalted butter(Melted)
  • 1 tbsp Smoked paprika
  • 2 tsp Garlic powder
  • 2 tsp Onion powder
  • 1 tsp Dried oregano
  • 1 tsp Dried thyme
  • 1/2 tsp Cayenne pepper(Adjust to your heat preference)
  • 1 1/2 tsp Kosher salt
  • 1 tsp Black pepper(Freshly ground)
  • 4 slices Thick-cut smoked bacon(Chopped)
  • 1 medium Yellow onion(Diced)
  • 4 cloves Garlic(Minced)
  • 2 large bunches Mustard greens(Stems removed, washed and torn)
  • 2 cups Chicken broth(Low sodium preferred)
  • 2 tbsp Apple cider vinegar
  • 1 tbsp Fish sauce(A chef's secret for umami)
  • 1 whole Lemon(Cut into wedges)

Instructions

  1. 1

    In a large Dutch oven over medium heat, render 4 slices thick-cut smoked bacon, chopped until crisp, about 5 minutes. Add 1 medium yellow onion, diced and sauté until translucent, about 3 minutes.

    8 min

    Tip: Don't rush the bacon; you want that smoky fat fully rendered to build the base of your potlikker.

  2. 2

    Stir in 4 cloves garlic, minced and cook for 30 seconds until fragrant. Pour in 2 cups chicken broth, 2 tbsp apple cider vinegar, and 1 tbsp fish sauce. Bring to a simmer, then begin folding in 2 large bunches mustard greens, torn in handfuls until wilted. Reduce heat to low, cover, and braise.

    30 min

    Tip: The greens will look like too much for the pot at first, but they will cook down beautifully. Keep the lid tight.

  3. 3

    While the greens are braising, prepare the blackening seasoning. In a small bowl, whisk together 1 tbsp smoked paprika, 2 tsp garlic powder, 2 tsp onion powder, 1 tsp dried oregano, 1 tsp dried thyme, 1/2 tsp cayenne pepper, 1 1/2 tsp kosher salt, and 1 tsp black pepper.

    5 min

    Tip: Make sure your spices are fresh. The paprika and cayenne are the stars of this rub.

  4. 4

    Pat 4 6-oz catfish fillets completely dry with paper towels. Brush both sides evenly with 4 tbsp unsalted butter, melted, then generously press the spice mixture into the flesh to create a thick, even crust.

    5 min

    Tip: Drying the fish ensures the butter sticks, and the butter helps the spices adhere while providing the fat needed for the blackening process.

  5. 5

    Place a large cast-iron skillet over high heat and let it get screaming hot. You want to see faint wisps of smoke coming off the dry iron.

    5 min

    Tip: Turn on your exhaust fan and open a window! Authentic blackening requires intense heat and will produce smoke.

  6. 6

    Carefully place two of the seasoned catfish fillets into the hot cast-iron skillet. Cook undisturbed for 3 minutes until a dark, crusty sear forms. Gently flip with a thin fish spatula and cook another 3 minutes. Remove to a warm plate.

    6 min

    Tip: Do not move the fish once it hits the pan; let that dark crust form undisturbed.

  7. 7

    Repeat the process with the remaining two seasoned catfish fillets, cooking for 3 minutes per side until properly blackened and opaque throughout.

    6 min

    Tip: If the pan gets dangerously smoky, you can slightly reduce the heat, but keep it high enough to maintain the sear.

  8. 8

    Using tongs, divide the braised mustard greens among four shallow bowls, spooning a little of that rich potlikker over the top. Gently place a blackened catfish fillet on each bed of greens and serve immediately with wedges from 1 lemon, cut into wedges.

    2 min

    Tip: A fresh squeeze of lemon juice right at the end cuts through the smoke and richness beautifully.

Chef's Notes

Make sure your cast-iron skillet is uncomfortably hot before you drop the fish in. True blackening is a smoky affair, but that smoke is exactly what builds the flavor. The fish sauce in the potlikker won't make the greens taste fishy at all; it simply amplifies the deeply savory, salty notes of the smoked bacon in a way that traditional salt never could.

Frequently Asked Questions

How long does Cast-Iron Blackened Catfish with Potlikker-Braised Mustard Greens take to make?

Cast-Iron Blackened Catfish with Potlikker-Braised Mustard Greens takes about 1 hour 7 minutes total. That includes 15 minutes of prep and 52 minutes of cooking.

How many servings does this recipe make?

This recipe makes 4 servings.

What skill level is needed for Cast-Iron Blackened Catfish with Potlikker-Braised Mustard Greens?

This recipe is rated medium — it's intermediate, requiring some cooking experience.

What ingredients do I need for Cast-Iron Blackened Catfish with Potlikker-Braised Mustard Greens?

The main ingredients are: Catfish fillets, Unsalted butter, Smoked paprika, Garlic powder, Onion powder, Dried oregano, Dried thyme, Cayenne pepper, Kosher salt, Black pepper, Thick-cut smoked bacon, Yellow onion, Garlic, Mustard greens, Chicken broth, Apple cider vinegar, Fish sauce, Lemon.

What type of meal is Cast-Iron Blackened Catfish with Potlikker-Braised Mustard Greens?

Cast-Iron Blackened Catfish with Potlikker-Braised Mustard Greens is categorized as: dinner.