Name: Creamy Seafood Gratin: A Comforting Feast for Your Heart
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Ingredients: 1 pound mixed seafood (Substitutions: shrimp, scallops, crab, lobster, or even smoked salmon); 1/2 cup dry white wine (Adds acidity and depth); 1 small onion (finely chopped); 2 cloves garlic (minced); 2 cups milk (Substitution: half-and-half for a lighter version); 1/4 cup all-purpose flour; 1/4 cup heavy cream (Substitution: cashew cream or coconut cream for dairy-free option); 2 tablespoons butter (For making the roux); 1/4 cup grated Parmesan cheese (Extra for topping); 1/4 cup grated Gruyere cheese (Extra for topping); 1/4 cup breadcrumbs (Enhance with more cheese); 1 tablespoon chopped fresh parsley; 1 teaspoon lemon zest; Salt (for seasoning); freshly ground black pepper (for seasoning); pinch of nutmeg (warm background flavor); 1/4 cup chopped cooked lobster meat (Boosts luxury and flavor)

The moment that warm, buttery aroma wafts from the oven and fills the air, I instantly know—it’s seafood gratin night! This rich and creamy dish transforms a simple gathering into a coastal feast, making it ideal for special occasions and cozy weeknight dinners alike. Picture this: tender pieces of seafood nestled in a luscious béchamel, topped with a golden, crunchy crust. Not only is this seafood gratin a showstopper at the dinner table, but its versatility means you can play with various seafood and cheese combinations or even sneak in some veggies for an extra boost. Tired of the same old fast food routine? This comforting treasure awaits! What seafood will you choose to create your version of this delightful dish?

Why is this recipe a must-try?

Versatile Ingredients: You can customize this gratin with your choice of seafood—shrimp, crab, or even smoked salmon—and adapt it with different cheeses to suit your taste.

Crowd-Pleasing Comfort: This creamy seafood gratin is perfect for entertaining, turning any gathering into a festive occasion with its inviting aroma and mouthwatering flavors.

Quick and Simple Prep: With straightforward instructions, you can whip up this dish in no time, making it an ideal weeknight dinner for busy food lovers.

Decadent Texture: The contrasting layers of creamy sauce and crunchy topping create an irresistible experience that will leave everyone asking for seconds.

If you’re looking for more seafood recipes, check out our Seafood Pasta or try this delicious Baked Salmon for a quick dinner!

Seafood Gratin Ingredients

For the Seafood Base
• 1 pound mixed seafood – Provides protein and flavor. (Substitutions: shrimp, scallops, crab, lobster, or even smoked salmon)
• 1/2 cup dry white wine – Adds acidity and depth to the flavor.
• 1 small onion – Builds the base flavor. (Prep: finely chopped.)
• 2 cloves garlic – Enhances the dish’s aroma and taste. (Prep: minced.)

For the Béchamel Sauce
• 2 cups milk – Provides creaminess to the sauce. (Substitution: half-and-half for a lighter version.)
• 1/4 cup all-purpose flour – Thickens the béchamel sauce.
• 1/4 cup heavy cream – Adds richness. (Substitution: cashew cream or coconut cream for dairy-free option.)
• 2 tablespoons butter – For making the roux.
• 1/4 cup grated Parmesan cheese – Flavor boost in the sauce. (Extra for topping.)
• 1/4 cup grated Gruyere cheese – Melts beautifully and adds a nutty flavor. (Extra for topping.)

For the Topping
• 1/4 cup breadcrumbs – Creates a crispy topping. (Enhance with more cheese.)
• 1 tablespoon chopped fresh parsley – Adds freshness.
• 1 teaspoon lemon zest – Brightens the dish.
• Salt and freshly ground black pepper – For seasoning.
• Pinch of nutmeg – Warm background flavor.

Optional Add-Ins
• 1/4 cup chopped cooked lobster meat – Boosts luxury and flavor in your seafood gratin!

This collection of seafood gratin ingredients is your starting point for creating a creamy, comforting masterpiece that will surely impress your family and friends!

Step‑by‑Step Instructions for Seafood Gratin

Step 1: Prepare the Seafood
Start by thawing the mixed seafood if frozen, then pat it dry with paper towels to remove excess moisture. Chop larger pieces into bite-sized portions to ensure even cooking. This preparation is key to a successful seafood gratin, as it prevents a watery texture in the final dish.

Step 2: Sauté Aromatics
In a large skillet, heat 1/4 cup of olive oil over medium heat. Add the finely chopped onion and sauté for about 5-7 minutes until it becomes translucent and fragrant. Next, stir in the minced garlic and continue cooking for an additional minute, allowing the flavors to meld together beautifully.

Step 3: Deglaze with Wine
Pour in the 1/2 cup of dry white wine and bring it to a gentle simmer. Let it cook for about 2-3 minutes, allowing the alcohol to evaporate and the flavors to concentrate. This step adds depth to your seafood gratin, enhancing the overall taste of the dish.

Step 4: Cook the Seafood
Add the prepared seafood into the skillet, stirring gently to combine with the onion and garlic mixture. Cook for 5-7 minutes until the seafood is just cooked through and opaque. Discard any unopened shells to ensure a delightful bite when serving your seafood gratin.

Step 5: Season and Set Aside
Once the seafood is cooked, season the mixture with salt, freshly ground black pepper, and a pinch of nutmeg. Remove the skillet from heat and set the seafood mixture aside, allowing it to cool slightly while you prepare the creamy béchamel sauce.

Step 6: Make the Roux
In a medium saucepan, melt 2 tablespoons of butter over low heat. Once melted, whisk in 1/4 cup of all-purpose flour to form a roux, cooking for about 1-2 minutes until it starts to bubble and has a slightly golden color. This will thicken your béchamel sauce, creating the base for the seafood gratin.

Step 7: Create the Béchamel Sauce
Gradually whisk in 2 cups of milk, constantly stirring to prevent lumps from forming. Continue to cook for 5-7 minutes, or until the sauce has thickened and coats the back of a spoon. This creamy texture is essential for a rich seafood gratin that everyone will savor.

Step 8: Add Cream and Cheese
Remove the saucepan from heat and stir in 1/4 cup of heavy cream, 1/4 cup of grated Parmesan cheese, and 1/4 cup of Gruyere cheese. Mix until the cheeses are fully melted and incorporated into the sauce. Season with additional salt and pepper to taste, ensuring a flavorful béchamel.

Step 9: Combine Seafood and Sauce
Gently fold the béchamel sauce into the seafood mixture in the skillet. Add 1 teaspoon of lemon zest and 1 tablespoon of chopped fresh parsley, mixing well to incorporate these fresh flavors. This fusion of ingredients is what makes your seafood gratin truly delightful.

Step 10: Preheat the Oven
Preheat your oven to 375°F (190°C) and lightly grease a baking dish with butter or cooking spray. This ensures that your seafood gratin will bake evenly and not stick, offering a perfect texture once out of the oven.

Step 11: Assemble the Gratin
Spread the seafood mixture evenly in the prepared baking dish. In a small bowl, combine 1/4 cup of breadcrumbs with a little extra grated cheese if desired, then sprinkle this mixture generously over the seafood. This topping will create that sought-after crunchy layer once baked.

Step 12: Bake to Perfection
Place the baking dish in the preheated oven and bake for 20-25 minutes, or until the top is bubbly and golden brown. Once finished, allow the seafood gratin to rest for a few minutes before serving, ensuring all the flavors settle perfectly for a comforting and inviting dish.

How to Store and Freeze Seafood Gratin

Fridge: Store leftover seafood gratin in an airtight container for up to 3 days. Reheat in the oven to restore its creamy texture and crispy topping.

Freezer: You can freeze the gratin before baking. Wrap it tightly in plastic wrap and aluminum foil for up to 2 months. Bake from frozen, adding a few extra minutes to the cooking time.

Thawing: When ready to eat, transfer the frozen gratin to the fridge and allow it to thaw overnight before baking. This ensures even cooking for a delicious seafood gratin.

Reheating: For best results, reheat in the oven until warmed through and bubbly, restoring that delightful crispy topping everyone loves!

Expert Tips for Seafood Gratin

• Dry the Seafood: Thoroughly pat (or dry) the seafood before cooking to avoid excess moisture in your gratin, ensuring the perfect texture.

• Wine Wisdom: Adding a splash of dry white wine to the béchamel sauce enhances depth and richness—don’t skip this flavorful step!

• Taste Test: Regularly taste the béchamel for seasoning adjustments, as flavors can mellow during cooking. Your seafood gratin deserves the perfect balance!

• Prep in Advance: If making ahead, assemble the gratin and refrigerate it. Just remember to adjust baking times when cooking from cold.

• Variations Galore: Play with different seafood and cheese combinations or sneak in veggies like spinach or mushrooms for a unique twist each time you make your seafood gratin.

Seafood Gratin Variations & Substitutions

Feel free to customize your seafood gratin for a personal touch that will make your taste buds dance with joy!

Seafood Swap: Try using different seafood like shrimp, scallops, or even crab to create your own delightful version. Using a variety of seafood adds complexity and interest to every bite.
Cheese Twist: Replace Gruyere with Fontina or mozzarella for a different creamy melt. Experimenting with cheese can bring new flavors and textures to your gratin!
Herb Infusion: Swap out parsley for fresh dill or tarragon to elevate the flavor profile. The addition of herbs can brighten the dish and provide appealing aromatic notes.
Vegetable Boost: Incorporate spinach or sautéed mushrooms for added nutrition and richness. Vegetables not only enhance the flavor but also give your gratin a heartier texture.
Spicy Kick: Add red pepper flakes to the béchamel for a subtle heat. A little kick can transform the dish, making it exciting for those who enjoy a bit of spice.
Dairy-Free Version: Use cashew cream or coconut cream instead of heavy cream for a delicious alternative. It’s a fantastic option for dairy-free guests, without sacrificing creaminess.
Nutty Flavors: Mix in a tablespoon of toasted pine nuts or slivered almonds for a delightful crunch. The added texture and flavor contrast can take your gratin to the next level.
Make-Ahead Magic: Assemble the gratin and refrigerate it overnight before baking. This not only saves time on busy days but allows the flavors to meld beautifully for a more profound taste.

If you’re seeking more seafood inspiration, don’t miss our delicious Seafood Pasta or try the delightful Baked Salmon as perfect options to complement this gratin!

What to Serve with Seafood Gratin

Elevate your seafood gratin experience by pairing it with delightful sides and drinks that enhance this creamy dish’s flavors.

Crisp Green Salad: A fresh salad with mixed greens and a tangy vinaigrette balances the richness of the gratin beautifully. The crunch of the salad complements the creamy texture, creating a harmonious dining experience.
Garlic Bread: Serves as the perfect vessel for scooping up the luscious sauce. Its crunchy exterior and soft inside contrast wonderfully with the gratin’s creamy filling.
Roasted Vegetables: Opt for seasonal vegetables like asparagus or Brussels sprouts. Their caramelized flavors offer a delightful earthy note against the seafood, creating a robust, well-rounded meal.
Cheesy Polenta: Creamy, cheesy polenta adds a comforting side that echoes the gratin’s richness while offering a satisfying texture variation.
Chardonnay: A glass of crisp, chilled Chardonnay complements the seafood’s flavors, enhancing the dish and providing a refreshing contrast with each sip.
Lemon Sorbet: End the meal with a light, citrusy lemon sorbet, cleansing your palate and leaving a refreshing finish after the comforting gratin. This dessert offers a delightful contrast to the richness of the dish and rounds out the experience perfectly.

Make Ahead Options

These Seafood Gratin make-ahead options are perfect for busy home cooks looking to save time without sacrificing flavor! You can prepare the seafood mixture (steps 1-5) up to 24 hours in advance; simply refrigerate it once cooled (this keeps it fresh and prevents any fishy odors). The béchamel sauce can also be made ahead (steps 6-8) and stored separately in the fridge. When you’re ready to bake, combine the seafood and béchamel, top with breadcrumbs and cheese, and pop it in the oven for about 25-30 minutes. This way, you’ll enjoy creamy and comforting Seafood Gratin just as delicious as if it were freshly made!

Seafood Gratin Recipe FAQs

What type of seafood should I use?
Absolutely! You can use a mix of seafood like shrimp, scallops, crab, or even lobster. Each brings a unique flavor, so feel free to experiment until you find your favorite combination.

How long can I store leftovers?
Leftover seafood gratin can be stored in an airtight container in the fridge for up to 3 days. Just remember to reheat it gently in the oven to regain its creamy consistency and crunchy topping.

Can I freeze seafood gratin?
Very! To freeze, wrap the assembled gratin tightly in plastic wrap and then in aluminum foil, making sure it’s secure. It will last for up to 2 months in the freezer. When ready to enjoy, simply bake it from frozen, adding a few extra minutes to the cooking time to ensure it’s heated through.

What if the béchamel sauce is too thick or lumpy?
If your béchamel sauce turns out too thick, whisk in a little more milk, a tablespoon at a time, until you reach your desired consistency. For lumps, use an immersion blender to smooth it out. Cooking it gently and stirring continuously will also help to avoid lumps in the first place.

Can I use gluten-free ingredients?
Absolutely! To make your seafood gratin gluten-free, simply substitute the all-purpose flour with a gluten-free blend and use gluten-free breadcrumbs for the topping. This way, you can enjoy a comforting dish without compromising on dietary needs.

Is it safe to reheat seafood?
Yes, it’s safe to reheat seafood, as long as it’s done correctly. Make sure to heat it thoroughly in the oven until it’s piping hot throughout. This will help maintain both safety and flavor in your delectable seafood gratin recipe!