This Baked Flounder Recipe with Lemon Butter Sauce gives delicate flounder fillets a bright, buttery garlic sauce and a golden breadcrumb topping. Flounder cooks quickly in the oven, so the key is to watch the fillets closely and avoid overcooking them. Ready in about 30 minutes, this baked fish recipe is an easy way to cook mild, flaky flounder with plenty of fresh lemon and garlic flavor.
Prep Time10 minutesmins
Cook Time20 minutesmins
Total Time30 minutesmins
Course: Dinner, Main Course
Cuisine: French
Keyword: fish recipe, flounder fish, lemon butter garlic sauce
Preheat oven to 350°F. Lightly pat the fish with paper towels to remove excess moisture. Grease a shallow baking dish, cast-iron skillet, or baking sheet with a bit of butter. Place the flounder fish fillets in the baking dish in an even layer and rub with olive oil, and season with salt and pepper. Cover and let rest for 30 minutes.
Combine garlic, lemon juice, zest, and butter in a small bowl. Pour the lemon-butter mixture over the fish. Sprinkle the flounder fish with bread crumbs.
Bake for 15-25 minutes or until the fish is cooked and the topping is golden. Cooking time varies slightly depending on the thickness of the fillets. Bake until the fish is cooked through and flakes with a fork.
Let stand for 5 minutes before serving. Sprinkle with parsley (or tarragon) and serve with fresh lemon wedges. After plating the fish- spoon sauce from the baking dish on top of the fish.
Notes
Pat the fillets dry before seasoning. Removing excess moisture helps the seasoning and breadcrumb topping adhere to the fish.
Pay attention to the thickness of the fillets. Thin pieces can cook several minutes faster than thicker ones, so begin checking early.
Use an instant-read thermometer. The thickest part of the fish should reach 145°F for reliable doneness.
Don't overbake the fish. Flounder is delicate and can become dry when left in the oven too long.
Thaw frozen flounder first when possible. Thawed fillets release less excess moisture and give you better control over the final texture.