If you have been searching for a flavorful, fuss-free fish dinner that will delight your taste buds and impress your guests, look no further than this Garlic Parmesan Flounder Recipe. This dish combines tender flounder fillets with a luscious, garlicky Parmesan topping that bakes to golden perfection, delivering a mouthwatering blend of creamy, tangy, and savory notes in every bite. It’s so simple to prepare yet feels special enough for any occasion. Trust me, once you try this recipe, it will quickly become one of your favorite weeknight meals or go-to dishes for entertaining.

Ingredients You’ll Need
Each ingredient in this Garlic Parmesan Flounder Recipe plays an essential role in building layers of flavor and texture. From the creamy Parmesan butter topping to the fresh lemon juice that brightens the dish, these simple staples come together effortlessly to create a dinner that’s both elegant and approachable.
- Flounder fillets: Choose fresh or thawed fillets that are about 6 ounces each for the perfect portion size and flaky texture.
- Grated Parmesan cheese: Adds a sharp, nutty flavor that browns beautifully on top.
- Unsalted butter (softened): Creates a rich and spreadable base for the topping without overpowering the fish.
- Mayonnaise: Helps bind the topping ingredients and adds subtle creaminess that keeps the mixture moist during baking.
- Fresh lemon juice: Provides a zesty brightness that balances the richness of the cheese and butter.
- Minced garlic cloves: Infuse the dish with their unmistakable aromatic punch.
- Dried basil: Adds a hint of herbaceous warmth and depth.
- Onion powder: Enhances the savory notes without adding texture.
- Salt and black pepper: Essential seasonings bring out all the flavors.
- Chopped parsley and lemon wedges (optional): Fresh garnish that adds color and a final burst of freshness.
How to Make Garlic Parmesan Flounder Recipe
Step 1: Prepare the Oven and Baking Sheet
Start by preheating your oven to 400°F. While it warms up, line a baking sheet with parchment paper to prevent sticking and make cleanup a breeze. This step sets the stage for evenly cooked, beautifully presented fillets.
Step 2: Season the Flounder
Place your flounder fillets on the prepared baking sheet. Lightly sprinkle salt and black pepper on both sides to enhance their natural flavor. This simple seasoning ensures that the fish’s delicate taste isn’t masked but perfectly complemented.
Step 3: Make the Garlic Parmesan Topping
In a small bowl, combine the grated Parmesan cheese, softened butter, mayonnaise, fresh lemon juice, minced garlic, dried basil, onion powder, salt, and black pepper. Mix well until you form a smooth, spreadable paste. This glorious mixture is the star component that transforms plain flounder into an irresistible dish.
Step 4: Spread the Topping on the Fillets
Use the back of a spoon or a small spatula to evenly dollop and spread the Parmesan mixture over the top of each fillet. Ensure an even layer that will melt and brown beautifully as it bakes.
Step 5: Bake Until Perfectly Cooked
Bake the fillets in the preheated oven for 12 to 15 minutes, until the fish flakes easily when tested with a fork and the topping has turned a lovely golden brown. If you want that extra bit of crispness and color, slide the baking sheet under your oven’s broiler for 1 to 2 minutes—just watch closely so it doesn’t burn.
How to Serve Garlic Parmesan Flounder Recipe

Garnishes
A sprinkle of freshly chopped parsley adds bright green notes and a pop of freshness that lightens the dish visually and flavor-wise. Don’t forget a wedge of lemon on the side for anyone who loves a little extra citrus zing right at the table.
Side Dishes
This Garlic Parmesan Flounder Recipe pairs beautifully with a variety of sides. For a classic, try garlic mashed potatoes or a buttery risotto to soak up every bit of the sauce. For lighter options, a crisp green salad or steamed asparagus balances the richness perfectly.
Creative Ways to Present
To impress your guests, serve your fillets on individual plates with a lemon wedge perched at the corner and a sprinkle of parsley. Alternatively, present the fillets atop a bed of sautéed spinach or quinoa, letting the vibrant colors contrast beautifully with the golden Parmesan topping.
Make Ahead and Storage
Storing Leftovers
If you have any leftovers from your Garlic Parmesan Flounder Recipe, store them in an airtight container in the refrigerator. They will keep well for up to 2 days without losing much flavor or texture.
Freezing
While this dish is best enjoyed fresh for optimal tenderness, you can freeze cooked fillets wrapped tightly in foil and placed in a freezer-safe bag. Use within one month for best results to prevent the delicate fillet from drying out.
Reheating
Reheat leftovers gently either in a low oven (about 325°F) or in a microwave at reduced power. Aim to warm the fish without overcooking it, to maintain that silky flounder texture and chewy Parmesan crust.
FAQs
Can I use other types of fish for this Garlic Parmesan Flounder Recipe?
Absolutely! While flounder is ideal because of its delicate texture and mild flavor, you can substitute cod, tilapia, or sole. Just keep an eye on cooking times as thicker fillets may require a few extra minutes in the oven.
Is mayonnaise really necessary in the topping?
The mayonnaise adds moisture and creaminess to the topping, helping it adhere well to the fish and stay luscious after baking. If you prefer, you can slightly reduce it, but omitting it entirely may affect the texture.
How can I make the Parmesan topping extra crispy?
To achieve a crispier, golden crust, broil the fillets for 1 to 2 minutes after baking. Keep a close watch to avoid burning since broilers vary in intensity.
Can I prepare this dish ahead of time?
You can assemble the fillets with the Parmesan topping a few hours before baking and keep them refrigerated. Just bake right before serving to ensure the fish remains tender and the crust crispy.
What wine pairs well with Garlic Parmesan Flounder Recipe?
A crisp, light white wine like Sauvignon Blanc or a dry Chardonnay complements the creamy, garlicky flavors while balancing the richness of the Parmesan topping perfectly.
Final Thoughts
This Garlic Parmesan Flounder Recipe is a true winner in my kitchen, combining ease, elegance, and incredible flavor in one fabulous dish. Whether you’re cooking for family dinner or surprising friends, it’s sure to become a beloved classic. So, don’t hesitate—gather your ingredients and give it a try tonight. I promise it will be love at first bite!
