Flounder Recipe with Lemon Butter Sauce

This flounder recipe with lemon butter sauce is easy, healthy, quick, elegant, family-friendly, and dirties just one skillet. That’s to say nothing of its crisp brown crust and its tender, flaky perfection.

Flounder  Recipe

Elegant and easy, this flounder recipe with lemon butter sauce is, in the words of its creator, an easy weeknight meal to pull together without nary a hassle. We can vouch for that. So can the literally hundreds of readers who click on this recipe weekday afternoons. Although cooking fish is commonly perceived as tricky, this recipe nails it, almost effortlessly creating a crisp browned crust on the exterior and a tender, flaky interior. As the author explains, “The key to crisp perfection is to make sure the fillets are extra dry by patting them with paper towels and dusting them with just a tiny bit of flour. You may be tempted to pull out your nonstick skillet, but to get that crisp crust you’re better off with a heavy-bottomed stainless steel pan.” Any white fish fillet works in this recipe, so opt for whatever looks fresh and is priced within your means. This recipe has been updated. Originally published July 26, 2012.Renee Schettler Rossi

Why You Need To Use Fresh, Not Frozen, Fish In This Recipe

Although this flounder recipe with lemon butter sauce is quick and easy, there is a trick to it. The catch is that in order to make this nifty little weeknight number, you’re going to have to ante up for fresh, not frozen, fish. Though it may be tempting, don’t substitute thawed frozen fish, as it’ll throw off quite a lot of moisture during cooking, destroying the lovely crisp crust that otherwise forms so perfectly on seared fish. Trust us, this recipe is definitely worth a few extra hard-earned dollars. If you don’t have fresh flounder available, simply opt for any thin, mild, white-fleshed fish. Think wild sea bass, snapper, catfish, tilapia…

Flounder Recipe

  • Quick Glance
  • 15 M
  • 15 M
  • Serves 4

Ingredients

  • Four 4- to 6-ounce, 1/2-inch-thick fresh (not frozen) flounder fillets (or substitute sole, snapper, catfish, tilapia, swai, or any thin white fish)
  • 1/2 teaspoon kosher salt
  • 1/4 teaspoon ground black pepper
  • 2 tablespoons vegetable oil
  • 1 teaspoon or so all-purpose flour or rice flour (optional)
  • 3 tablespoons unsalted butter, cut into 4 slices
  • Juice of 1 lemon (about 1/4 cup)
  • 2 tablespoons finely chopped fresh herbs, such as basil, chives, or flat-leaf parsley

Directions

  • 1. Pat both sides of the fish fillets dry with paper towels and then season them with salt and pepper. Heat the oil in a medium skillet (preferably cast-iron or stainless steel and not nonstick) over medium-high heat until the oil ripples but isn’t smoking, 1 1/2 to 2 minutes. While the oil is heating, go ahead and pat both sides of the fillets dry a second time.
  • 2. Sprinkle a little flour, if using, over both sides of the fillets and use your fingers to evenly coat both sides. Add the fillets to the skillet and cook, without moving, for 2 minutes. Slide a thin metal spatula underneath the fillets (making sure to use firm pressure to scrape up any of the golden crust that may be sticking to the bottom) and carefully flip the fillets. If it seems impossible to slip the spatula beneath the fillet and the skillet, wait 30 seconds or so and try again. The fish will release when it’s ready–and only when it’s ready.
  • 3. Place a slice of butter on top of each fish fillet and stand idly by as it melts and drips off the fish into the skillet. Cook the fish until it springs back from light pressure, about 2 minutes. Use a spatula to transfer the fish to a platter or to 4 plates. Squeeze the lemon juice into the skillet and, with the skillet still over the heat, use a wooden spoon to scrape up any browned bits stuck to the bottom of the skillet. Stir in the fresh herbs and spoon the sauce over the fish.

Gluten-Free Flounder Recipe

  • Although a dusting of flour does make for a swell crust on these pan-seared fish fillets, it’s not necessary. There’s an editor here at LC (ahem) who can attest that flour isn’t at all essential for a lovely sear on fish. She sizzles flounder fillets for supper quite frequently in a sturdy stainless steel skillet and they never, ever have a flour coating. It’s just not necessary. If you’re accustomed to the thin coating imparted by flour but are gluten-free, then you can use rice flour in place of all-purpose flour, as noted in the recipe above, and it will work just dandy.
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Recipe Testers Reviews

Recipe Testers Reviews
Testers Choice
Helen Doberstein

Jun 20, 2016

There’s nothing better than simple for dinner. This flounder recipe with lemon butter sauce is easy to prepare and delicious to eat. The preparation allows the fish to shine as the main ingredient. I chose not to use the flour and just used a good stainless steel pan that I’d lightly oiled. This produced a light crust without overcooking the fish. The juice of one large lemon was enough to make a light pan sauce, and I chose fresh tarragon and parsley for the herbs. Since basa was on sale, I used that. A simple dish that made for a great meal. I’d certainly make this again.

Testers Choice
Tamiko Lagerwaard

Jun 20, 2016

This flounder recipe makes a nice, light, quick meal. I used snapper instead of flounder and lightly dredged the fish with flour instead of dusting it. The pat of butter on top was a unique twist to the way I usually make fish, and it added a richness not only to the finished sauce but also to the fish itself. I liked the tangy lemony sauce on its own and left out the herbs. The crust was indeed crisp and brown, and the fish tender and moist. Wonderful on a hot summer day.

Testers Choice
Sita Krishnaswamy

Jun 20, 2016

This flounder with lemon butter sauce was an easy recipe. I loved the flavors. The lemon butter sauce had the most amazing lemony, nutty, buttery taste. Poured over the the flounder, it was just the right balance for such a delicate fish. I used 4 flounder fillets and sprinkled just a wee bit of flour on them. I didn't dredge them in the flour. An easy weeknight recipe that takes under 30 minutes to put together.

Testers Choice
Ayanna Fews

Jun 20, 2016

This flounder recipe is a nice, easy, and quick recipe! The lemon butter sauce makes the dish, as the fish is so mild. I used swai fillets, as my grocery store didn’t have flounder. I opted to flour the fish, and unfortunately, my fish did stick a bit. I find that this type of fish tends to be more fragile once cooked. I don’t think that the suggested 2 minutes was quite long enough for it to form a crust. Perhaps I should have cooked it a bit longer. I didn’t let the sticking fish deter me from finishing off the sauce, though. I went ahead and cooked the fish on the other side, removed it, and just scraped up everything, added the fresh herbs (I used parsley and chives) and lemon juice, and poured all the little crumbles and sauce over the fish. It was still very good!

Testers Choice
Anna Scott

Jun 20, 2016

I like this flounder recipe with lemon butter sauce mainly because I love anything involving lemons. It’s one of those recipes that you probably already have all of the ingredients for in your pantry—except for the fish, I mean. I couldn’t find flounder in my grocery store, so I used tilapia instead. Since tilapia is thicker than flounder, I adjusted the cooking time accordingly. (I cooked the tilapia for three minutes per side instead of two.) I wouldn't omit the flour-coating step in this recipe. I think that's what gives the fish the nice brown coating that goes oh-so-well with a lemony sauce. We had some nice chives in our herb garden, so that is the herb I chose to use here. Some fresh dill would also work well, I think. I recommend using more than 1 lemon for the sauce; we used 2 for 2 tilapia filets, and it was just enough sauce in my opinion. Overall, this is a great technique for cooking a thin white-fleshed fish. Adding some capers to the sauce before serving would work well, too.

Testers Choice
Sheri C.

Jun 20, 2016

This technique for how to cook flounder is so simple that it's barely a recipe. But it’s a lovely way to prepare any firm white fish fillet, and it comes together in just a few minutes. I used sole and parsley, although it would be really nice with tarragon, too.

Testers Choice
Jackie G.

Jun 20, 2016

We made this flounder recipe using Pacific Dover sole. Flounder is not something really found here on the West Coast. The sole fillets weighed between 2 and 3 ounces each, but that didn't seem to make a difference in the cooking time. It turned out to be a very nice alternative to Sole à La Meunière or other dishes where you make brown butter for the fish. Letting the butter melt into the fish after turning it for the first time made the dish very easy and quick to make.

Testers Choice
Brenda Carleton

Jun 20, 2016

Today’s lunch was a delightful fish feast! Rather than flounder, which I cannot get where I live, I used sole, which is a great substitute. Sometimes fish does not crisp as you would like, but this recipe provides a great solution. The key is patting the fish dry twice and using a tiny bit of flour (I used rice flour, as it does a great job of crisping things up). It was subtly buttery with a hit of fresh lemon, which goes extraordinarily well with white fish. I really enjoyed the chives as well. Capers would be fabulous with this fish. If you have flounder or sole and about 10 minutes (or even 7 or 8), you can create this wonderful dish. I loved it! As the recipe says, don’t be tempted to use a nonstick pan. It won’t work nearly as well.

Testers Choice
Dawn E.

Jun 20, 2016

I'm a huge fan of simple, quick, and versatile recipes, and this flounder recipe checks off all of those boxes. I was in the mood to cook a new fish, rockfish fillets, and I searched on the LC site for a recipe. The lemon butter sauce sounded delicious, and it was. My family loved the preparation, and my husband kept asking me how I made it. I seared my fillets in a cast-iron skillet, and since they were so delicate, they broke in half. I truly believe this is all about mastering the technique, and in my case, I probably did not use enough oil. I will try a stainless steel skillet for comparison next time, but the lemon, butter, salt, and pepper made the fish really delicious. Hats off to another LC weeknight dinner recipe that made me a star at home!

Comments
Comments
  1. Alexis says:

    I make an almost identical recipe regularly. A good variation (which gives a thicker crust) is to dust with flour, then dip in beaten eggs (thinned with a little milk) and then straight into the hot pan. Even a picky 5.5 year old can’t fault it.

  2. Martin says:

    I didn’t have any lemons in the house, so I substituted key lime juice. It worked well. Great and fast recipe. I had problems with the fish sticking, too, and worried between not letting the fillets fry long enough and letting them in the skillet too long until they burnt and stuck to the skillet. I chose not to flour them.

    • Renee Schettler Rossi says:

      Martin, I pan-fry fish quite a lot, and I’ve had my share of sticking, too. Although I find when I start it on medium-high and wait until it gets a crisped, golden-brown surface, then reduce the heat to medium-low and let the fish finish cooking until it’s opaque throughout, the fish will release when it’s done, and without getting burnt on the outside. You can flip it if you wish. I have also tried starting it on the stovetop and then instead of turning the heat down, I slide the entire skillet in a 350°F oven for a few minutes, the fish also remains moist throughout and releases easily, although the crisped side turns a tad soggy. lIt takes a little practice to discern when to turn the heat down or slide the skillet into the oven, which is largely dependent on the thickness of the fish fillet. But perhaps that will help…?

  3. Joyce says:

    Wow! so easy, so quick, soooooooooooooooo good.

  4. Milica says:

    This got way too oily. I prefer to bake fish and use some lemon. Simple but too oily for my taste.

    • Renee Schettler Rossi says:

      I’m really sorry to hear that, Millica. If you like the flavor of some, but not all, of the brown butter, you could always sizzle a touch of butter in a skillet and dribble it over baked fish for sorta the same effect.

  5. Roseanna Witherell says:

    Can I cook this recipe without using the flour?

  6. Richard says:

    why should I not use a non stick pan? does it effect the tast?

    • Renee Schettler Rossi says:

      Richard, if you have a nonstick pan and are comfortable with it, then by all means, go ahead and use it here. Some of us at Leite’s prefer not to use nonstick because of the questionable components that go into the manufacture of the skillet and worry about them leaching into food if the nonstick surface is scratched. We find a good seasoned cast iron skillet to work just fine as nonstick, but of course do as you wish here.

  7. Noemi says:

    Thank you so much for this delicious easy recipe! Although I did deviate slightly. I used frozen flounder, a little more flour, lime instead of lemon, and a nonstick pan. It came out delicious, my picky husband and toddler cleaned their plates. :) Thanks again!

    • Renee Schettler Rossi says:

      You are so very welcome, Noemi! Many thanks for taking the time to let us know how well it turned out! Love your tweaks.

  8. Justin says:

    A wonderful recipe. Try this variation: lime instead of lemon. You get a different summer flavor. A little more tart on the tongue, but still a wonderful dish.

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