BBQ Catfish Recipe Grill: Smoky Char With Lemon Butter

There’s a reason grilled catfish has become a staple at my family gatherings in Austin. This method delivers perfectly smoky fillets with charred edges that flake at the touch of a fork.

The key is a hot grill and a simple lemon butter baste that enhances the fish’s natural sweetness. I learned this technique from a local fisherman who supplied Nana Mae’s diner back in Atlanta.

What you get is tender, moist catfish with a subtle char that pairs beautifully with the bright, creamy lemon butter. The grill imparts that unmistakable smoky flavor without overpowering the fish.

Serve with sliced lemons and fresh herbs for a dish that feels special enough for company but simple enough for a weeknight.

Ingredients for Bbq Catfish Recipe Grill

Simple list for smoky, buttery grilled catfish with bright citrus notes.

The catfish is the star here. Look for skin-on fillets at your seafood counter—they hold up better on the grill. I grab mine from Whole Foods or H-E-B in Austin (the local chain that actually has decent seafood). Thickness matters: aim for 1-inch thick so they don’t overcook. If buying frozen, thaw overnight in the fridge—never at room temp.

No fresh lemons? Bottled lemon juice at half the amount works in a pinch, but you’ll miss the zest. Short on parsley? Cilantro or chives add a nice pop of color. The butter can’t be skipped though—it’s what makes that glossy, flavorful crust. If you’re avoiding dairy, olive oil with extra lemon gets you close, but it won’t be the same.

Catfish cooks fast—have everything prepped before it hits the grill. The lemon butter keeps in the fridge for 3-4 days, but it’s best fresh. Leftovers? 2-3 days max in the fridge. Reheat gently in a skillet to keep it from drying out.

Step-by-Step Instructions for BBQ Catfish on the Grill

Here’s the method I use for perfectly charred catfish with a bright, buttery finish.

Step 1: Season the Catfish Fillets

Pat the 1.5 lb catfish fillets dry with paper towels to ensure a good sear. This step is crucial—any moisture will cause steam instead of that beautiful char we’re after. Season both sides evenly with 1 tsp kosher salt, ½ tsp freshly ground black pepper, and all of the 1 tsp paprika.

I like to let the seasoned fillets sit at room temperature for 10-15 minutes while the grill heats up. This takes the chill off the fish so it cooks more evenly. You’ll notice the salt starts to draw out a bit of moisture—that’s normal and helps the seasoning penetrate.

Step 2: Prep the Lemon Butter Baste

In a small saucepan, melt the 0.5 cup unsalted butter over low heat. Once melted, stir in the 0.25 cup fresh lemon juice, 1 tbsp lemon zest, and 3 cloves minced garlic cloves. Let this mixture simmer for 2-3 minutes until fragrant.

The garlic should sizzle gently but not brown. If it starts to turn golden, remove the pan from heat immediately—burnt garlic will make the baste bitter. This lemon butter will add incredible brightness and richness to the smoky catfish.

Step 3: Grill the Catfish to Perfection

Preheat your grill to medium-high heat (about 400°F). Brush the grates thoroughly with 1 tbsp olive oil to prevent sticking. Place the fillets skin-side down on the grill and close the lid. Cook for 4-5 minutes until the skin is crisp and releases easily from the grates.

Here’s the thing—catfish can stick if you try to flip it too soon. Wait until you see the edges turn opaque and the skin looks crispy and charred before attempting to turn. Brush the top with some of the lemon butter baste, then flip and cook for another 3-4 minutes until the fish flakes easily with a fork.

Step 4: Finish with Fresh Herbs and Serve

Transfer the grilled catfish to a serving platter. Drizzle the remaining lemon butter over the top and sprinkle with 0.25 cup fresh parsley and 2 tsp fresh thyme. The herbs add a pop of freshness that cuts through the richness.

Serve immediately with the 4 pieces lemon wedges on the side. The acid from the lemon wedges brightens up each bite. I always recommend squeezing a little extra over the top right before eating—it takes the flavor to another level.

Storing and Reheating This Dish

Refrigerator Storage

Let your grilled catfish cool completely before storing—this takes about 20-30 minutes at room temp. Transfer to an airtight container with a paper towel on top to absorb excess moisture. It’ll keep in the fridge at 40°F or below for up to 2 days. David swears the flavors taste even better the next day. ❄️

Freezer Storage

For longer storage, wrap each fillet individually in plastic wrap, then place all in a freezer-safe bag or container. Squeeze out as much air as possible to prevent freezer burn. Your catfish will maintain quality for up to 2 months in the freezer.

Stovetop Reheating

My preferred method is in a skillet over medium-low heat. Add the catfish and a splash of water or fish stock, cover with a lid, and warm for 3-4 minutes per side. This keeps the fish moist and prevents drying out. 🔥

Microwave Reheating

Place catfish on a microwave-safe plate, cover with a damp paper towel, and heat on 50% power for 1-2 minutes. Check and repeat in 30-second intervals until warmed through. Be careful not to overheat—catfish can get rubbery quickly.

Serving Leftovers

Reheated catfish works great in tacos or over a salad. Flake the fish and toss with lemon juice and olive oil for a quick fish salad. I often serve leftovers with extra lemon wedges and fresh parsley to brighten the flavors.

Frequently Asked Questions