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How to Cook Flounder Fillet

Chef Cindy Mooney , On June 8, 2025

Mealpro

How to Cook Flounder Fillet


Arrowtooth flounder can be found along the Pacific Coast from Northern California to the Gulf of Alaska to the Bering Sea/Aleutian Islands. Males can reach 2 feet in length, and females grow a bit larger, up to almost 3 feet. Flounder is too large to be seared over a stovetop, so roasting is the best way to prepare this delicious fish.

Ingredients for Flounder Fillet

Flounder Fillet Recipe Ingredients

Ingredients needed for this flounder fillet recipe.

Note: Multiply the ingredients by the number of servings you wish to make. This recipe is designed to be a “Per Single Serving” recipe.

  • Lemon slices – 2 to 3 thin slices, plus extra for garnish
  • Fresh lemon juice – 1 Tbsp
  • Fresh parsley, chopped – 1 Tbsp
  • Salt – 1⁄8 tsp (or less, to taste)
  • Black pepper – 1⁄8 tsp (a light dusting)
  • Flounder fillet – 1 (about 6 to 8 oz)
  • Olive oil – 1 tsp

Kitchen Tools Needed for Flounder Fillet

  • Oven
  • Sheetpan
  • Optional: Oven-safe Parchment paper (For easy clean up)

Oven-baked Flounder Fillet recipe Cooking Instructions

  1. Dry the fish and remove bone:

    Pat the fish dry and feel for pin bones. Remove with a pair of tweezers if necessary.

    The size of a Flounder fillet on the sheetpan

    Flounder is a large fish. This flounder was 15 inch by 10 inch.

  2. Preheat Oven:

    Preheat your oven to 400°F (200°C).

  3. (Skip If NOT using parchment paper) Prepare Sheet Pan:

    Line a rimmed sheet pan with parchment paper to make cleanup easier.

  4. Place the Fillet:

    Place the Flounder fillet skin-side down (if skin-on) on the lined sheet pan.

    Flounder fillet on the sheetpan

    Flounder fillet on the sheet pan.

  5. Add Olive Oil:

    Drizzle 1 to 1½ tsp of olive oil over the top of the fillet and gently rub it in with a brush or clean fingers to coat evenly.

  6. Season Lightly:

    • Sprinkle 1⁄8 tsp salt and 1⁄8 tsp black pepper (or less) evenly over the top.

    • Avoid over-seasoning – it should enhance, not mask, the natural flavor.

  7. Add Lemon and Parsley:

    • Squeeze 1 tablespoon of lemon juice over the top.

    • Lay 2–3 lemon slices directly on top of the fish.

    • Sprinkle 1 tablespoon chopped parsley over the top.

  8. Bake:

    Place in the oven and bake for 8 to 10 minutes at 400°F, depending on fillet thickness. Flounder is done when it flakes easily with a fork and is opaque in the center (internal temp: ~130–135°F).

    The Flounder fillet going into the oven

    The flounder fillet going into the oven.

  9. Let Rest:

    • Remove from oven and rest for 2 minutes.

  10. Serve:

    Slice this fish to enjoy. Since this recipe uses lemon juice to add flavor, here is a fun and refreshing louisiana style dirty rice recipe to compliment the light lemon tanginess.

    The baked flounder Fillet

    Flounder is large so slice and serve to enjoy.


Chef Cindy Mooney

With a personal mission to spread the good name of nutrition through mouthwatering recipes, Chef Cindy's philosophy around cooking is deeply rooted in food as medicine. In the kitchen, she offers a conscious, restorative, and functional approach to cooking; an approach she has cultivated during her years working in farm-to-table restaurants.