American · Dinner

Flounder with Lemon Butter

Thin flounder fillets pan-cooked in unsalted butter and finished with lemon juice, zest and parsley. Four servings in 15 minutes.

Not yet ratedThis recipe has no ratings yet 15 min total Serves 4 servings Easy
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Don't Make These Mistakes

Use a wide spatula so that each fillet comes out of the pan in one piece.

Keep the first fillets warm on a plate but uncovered, so that steam does not soften them.

Do not let the butter brown; it should be pale and foaming.

Cooking Flounder with Lemon Butter

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  1. Pat the fillets dry and season with the pepper.

  2. Melt half the butter in a large non-stick frying pan over medium-high heat. Pan-fry two fillets for 2 minutes a side, until opaque and lightly golden. Lift them onto a warm plate and repeat with the other two.

  3. Wipe out the pan, add the remaining butter and melt it gently until it foams. Take the pan off the heat and stir in the lemon juice, zest and parsley.

  4. Spoon the lemon butter over the fish and serve at once.

Why It Works

Pat the fillets dry. Turn them only once. Flounder is thin and fragile, and a wet fillet steams and falls apart where a dry one browns and holds together. A wide, flexible spatula is the only tool you need.

The sauce is butter, lemon juice, zest and parsley. Use unsalted butter. Salted butter would bring in the sodium this recipe is trying to avoid. Melt it gently until it foams, then add the lemon off the heat so that it stays bright. A tablespoon or so per serving is plenty, because the lemon cuts through the richness.

Flounder cooks in 2 minutes a side. Remove it from the pan the moment it turns opaque. Serve with rice and steamed green beans, spooning the sauce over the fish. Being mild and low in fat, it relies on the sauce, and a good squeeze of extra lemon at the table never hurts.

After You've Cooked It

Best eaten at once. Keeps in the fridge for up to 1 day; reheat gently, covered.

Good With

  • Steamed white rice
  • Steamed green beans
  • A cucumber salad

Questions and Answers

How long does Flounder with Lemon Butter take to make?

About 15 minutes in total — 5 minutes of preparation and 10 minutes of cooking. The recipe serves 4.

What are the key tips for making Flounder with Lemon Butter?

Use a wide spatula so that each fillet comes out of the pan in one piece. Keep the first fillets warm on a plate but uncovered, so that steam does not soften them. Do not let the butter brown; it should be pale and foaming.

What should I serve with Flounder with Lemon Butter?

Steamed white rice; Steamed green beans; A cucumber salad.

How should Flounder with Lemon Butter be stored?

Best eaten at once. Keeps in the fridge for up to 1 day; reheat gently, covered.

Is Flounder with Lemon Butter suitable for a special diet?

This recipe is gluten-free, kidney-friendly, low-carb, keto and no added sugar. Those labels are checked against the ingredient list, so a dish is only marked when nothing in it contradicts the claim.

How many calories are in Flounder with Lemon Butter?

About 176 kcal per serving, with 25 g protein, 1 g carbohydrate and 8 g fat. The figures are calculated from the ingredient list and are an estimate.

The Numbers per Serving

Per serving, calculated from the ingredient list. Treat these as an estimate — brands and cuts vary.

176Calories
25gProtein
1gCarbs
8gFat
0gFibre
0gSugar
110mgSodium
450mgPotassium
250mgPhosphorus

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Written and tested by Turab

One person, one kitchen — no test kitchen, no team. How every recipe on this site is checked before it goes up.