Best Broiled Flounder Recipe: Zesty Lemon-Garlic Finish

This broiled flounder delivers restaurant-quality results with minimal effort. The key is a simple lemon-garlic finish that enhances the fish’s natural sweetness.

High heat ensures the flounder cooks quickly and evenly, while the zesty topping adds bright, aromatic flavor. This method guarantees tender, flaky fish every time.

Ingredients for Best Broiled Flounder

Fresh flounder, bright citrus, and aromatic herbs create this elegant yet effortless dish.

The flounder is the star—opt for wild-caught fillets from a reputable fishmonger like Whole Foods or your local seafood market. Look for fillets that are evenly thick (about 1/2-inch) to ensure even cooking under the broiler. Freshness is key: the flesh should smell clean and ocean-like, never fishy. If using frozen, thaw overnight in the fridge (worth the extra minute).

No flounder? Sole or tilapia work beautifully here. Out of white wine? Chicken broth with a splash of lemon gets you close. The capers add a briny punch—substitute chopped green olives if needed. For the butter, ghee works at a 1:1 ratio. The parsley garnish is optional, but it adds a pop of color and freshness.

Broiled flounder is best served immediately, but leftovers keep in the fridge for 1-2 days. Reheat gently in a 300°F oven to avoid overcooking. The lemon-garlic topping can be prepped 1 day ahead—store it covered in the fridge. Freezing cooked flounder isn’t ideal, as the texture suffers.

Step-by-Step Instructions for Broiled Flounder

Master these precise techniques for flaky, flavorful flounder with a bright citrus finish.

Step 1: Prep and Season the Fillets

Pat the 1.5 lb flounder fillets completely dry with paper towels. This step is non-negotiable—excess moisture prevents proper browning and crisping. Season both sides evenly with the 1 tsp kosher salt and 0.5 tsp freshly ground black pepper, pressing gently to adhere.

Arrange the fillets on a broiler pan or wire rack set over a baking sheet. Brush the top side lightly with 1 tbsp of the extra-virgin olive oil. This thin coating promotes even browning without steaming the fish. Let the seasoned fillets sit at room temperature for 10 minutes while you prepare the remaining components.

Step 2: Create the Zesty Lemon-Garlic Topping

In a small bowl, combine the zest of the whole lemon, 2 tbsp unsalted butter (melted), 4 cloves garlic cloves (minced), 1 whole shallot (finely minced), 1 tsp Dijon mustard, and 1 tbsp capers. Stir until fully incorporated. The mixture should be fragrant and slightly chunky.

Finely chop the 0.25 cup fresh parsley and set aside for garnishing. Juice the zested lemon and reserve the juice for the final touch. This topping delivers layers of flavor: the acidity cuts through the richness, while the garlic and shallot add depth.

Step 3: Broil to Perfection

Position an oven rack 6 inches from the broiler element and preheat the broiler on high. Slide the prepared fillets under the broiler and cook for 6-8 minutes until the edges begin to turn opaque and the tops show light golden browning.

Carefully remove the pan and spoon the lemon-garlic butter mixture evenly over each fillet. Return to the broiler for an additional 2-3 minutes until the topping is bubbling and the fish flakes easily when tested with a fork. Avoid overcooking—flounder finishes quickly under direct heat.

Step 4: Finish and Serve

Transfer the fillets to a serving platter. Drizzle with the remaining 2 tbsp extra-virgin olive oil and the reserved lemon juice. Sprinkle the chopped parsley evenly over the top for a fresh, vibrant finish.

For added depth, deglaze the broiler pan with 0.25 cup dry white wine on the stovetop over medium heat, scraping up any browned bits. Simmer for 1-2 minutes until slightly reduced, then drizzle this pan sauce over the fish just before serving. The sauce ties all the flavors together beautifully.

Regional Styles of This best broiled flounder

New England Style

In coastal New England, I keep this dish simple with just lemon, butter, and parsley. The local flounder is so fresh it needs little adornment. We often serve it with steamed lobster for a true seafood feast. 💪

Mediterranean Twist

For a Mediterranean approach, I add 1 tsp dried oregano and ½ tsp smoked paprika to the topping. A sprinkle of crumbled feta after broiling gives it that tangy Greek touch. Serve with warm pita bread.

Southern Style

Down South, we love a bit of heat. I mix ½ tsp cayenne into the butter topping and serve with a side of hot sauce. The spice complements the mild flounder beautifully. Cornbread makes an ideal companion.

This version always reminds me of summer evenings by the Gulf. 🌟

Asian-Inspired

Swap the lemon for 2 tbsp soy sauce and 1 tbsp grated ginger in the topping. Add 1 tsp sesame oil to the butter mixture. Garnish with sliced scallions and sesame seeds for an umami-packed dish.

Frequently Asked Questions