Fillet of Flounder Au Gratin
Elevate your seafood dinner with this rich and irresistibly creamy Fillet of Flounder Au Gratin. Tender flounder fillets are bathed in a luxurious, homemade cheese sauce featuring Parmesan and Gruyère, then topped with a golden, crispy bread crumb crust that’s infused with fresh parsley and a hint of garlic. The delicate balance of a velvety roux-based sauce and the zesty brightness of lemon juice makes this dish both indulgent and refreshing. Perfect for a special occasion or an elegant weeknight treat, this baked flounder recipe is easy to prepare in just 40 minutes and pairs beautifully with a light salad or roasted vegetables for a complete meal. Whether you're a seafood lover or hosting guests, this decadent yet approachable flounder gratin will be the highlight of the table.
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Recipe Information
Ingredients
- 4 pieces flounder fillets
- 3 tablespoons butter
- 2 tablespoons all-purpose flour
- 1.5 cups milk
- 0.5 cups heavy cream
- 1 cup grated Parmesan cheese
- 1 cup grated Gruyère cheese
- 0.5 cups bread crumbs
- 2 tablespoons lemon juice
- 2 cloves garlic, minced
- 0.5 teaspoons salt
- 0.25 teaspoons black pepper
- 2 tablespoons fresh parsley, chopped
- 1 tablespoon olive oil
Instructions
Preheat your oven to 375°F (190°C). Grease a large baking dish with olive oil and set aside.
Arrange the flounder fillets in the prepared baking dish in a single layer. Drizzle lemon juice evenly over the fillets and lightly season with salt and pepper. Set aside while preparing the sauce.
In a medium saucepan, melt the butter over medium heat. Add the minced garlic and sauté for 1-2 minutes until fragrant but not browned.
Sprinkle the flour over the melted butter and whisk continuously for about 1 minute to form a roux.
Gradually whisk in the milk and heavy cream, ensuring a smooth consistency. Cook, while stirring, for 3-5 minutes until the sauce thickens.
Stir in the Parmesan and Gruyère cheeses, reserving about 1/4 cup of each cheese for the topping. Mix until the cheese is melted and the sauce is smooth. Remove from heat.
Pour the cheese sauce evenly over the flounder fillets in the baking dish.
In a small bowl, mix the reserved cheeses with the bread crumbs and chopped parsley. Sprinkle this mixture evenly over the top of the sauce-coated fillets.
Drizzle a small amount of olive oil over the crumb topping to help it crisp up in the oven.
Bake in the preheated oven for 20-25 minutes, or until the topping is golden brown and bubbly, and the flounder is cooked through (it should flake easily with a fork).
Remove from the oven and let it rest for a few minutes before serving. Garnish with additional fresh parsley, if desired, and serve warm.
Nutrition Facts
Calories |
2000 | ||
|---|---|---|---|
% Daily Value* |
|||
| Total Fat | 128.3 g | 164% | |
| Saturated Fat | 67.8 g | 339% | |
| Polyunsaturated Fat | 2.6 g | ||
| Cholesterol | 524 mg | 175% | |
| Sodium | 4530 mg | 197% | |
| Total Carbohydrate | 72.9 g | 27% | |
| Dietary Fiber | 3.5 g | 12% | |
| Total Sugars | 23.3 g | ||
| Protein | 129.3 g | 259% | |
| Vitamin D | 16.2 mcg | 81% | |
| Calcium | 1563 mg | 120% | |
| Iron | 5.7 mg | 32% | |
| Potassium | 1638 mg | 35% | |
*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
