As I placed my trusty casserole dish on the counter, I could practically hear my family’s anticipation bubbling over. This Creamy Seafood Casserole Recipe, brimming with succulent shrimp, tender scallops, and sweet crab, is a dish that transforms an ordinary dinner into something extraordinary. With minimal fuss and an easy preparation method, you’ll serve up comforting, restaurant-quality flavors that make everyone at the table feel special. Whether you’re gathering around for a family meal or hosting a cozy get-together, this casserole is bound to be a hit with its irresistible crunchy topping and creamy interior. What delightful side could you pair with this seafood sensation to take it to the next level?

Why is seafood casserole a must-try?
Convenience: This Seafood Casserole Recipe offers a quick preparation, making it ideal for busy weeknights or last-minute gatherings.
Crowd-pleaser: Packed with a delightful mix of shrimp, scallops, and crab, it’s a dish that appeals to seafood lovers and impresses guests without requiring professional culinary skills.
Rich, Creamy Goodness: The luscious sauce, enhanced with flavors from garlic and Dijon mustard, creates a comforting experience perfect for curbing cravings.
Versatility: Feel free to add your favorite ingredients like spinach or mushrooms, or try swapping seafood for chicken or vegetables, offering something for everyone.
Make-Ahead Friendly: You can prep and freeze this casserole, making it an excellent option for busy days, just like a classic Cornbread Casserole Cozy that warms the soul.
Complete Meal: Pair with garlic bread or a fresh salad for a well-rounded feast that leaves everyone satisfied and eager for more!
Seafood Casserole Ingredients
• Discover the key ingredients for a delicious Seafood Casserole Recipe.
For the Creamy Base
- Butter – Adds richness and helps sauté vegetables; olive oil can be a lighter substitute.
- Onion – Provides a savory base flavor; use sweet onion for a milder taste.
- Garlic – Enhances overall flavor; fresh garlic is recommended for the best results.
- Heavy Cream – Creates the creamy texture of the sauce; half-and-half or non-dairy cream are good alternatives.
- Dijon Mustard – Adds tanginess and depth; yellow mustard may be used in a pinch.
- Worcestershire Sauce – Introduces umami complexity; soy sauce can substitute for a similar effect.
- Lemon Juice – Brightens the dish’s flavor; lime juice can work well as a substitute.
- Paprika – Provides flavor and color; smoked paprika can add a unique depth.
For the Seafood
- Shrimp – Main protein component; peel and devein for best results, or substitute with cod or haddock.
- Scallops – A key seafood component that should be fresh or properly thawed.
- Crab Meat – Adds sweetness; ensure no shell fragments are included, or swap for lobster meat if desired.
For the Topping
- Cheddar Cheese – Supplies creaminess and flavor to the topping; try Swiss or Gruyère for a different taste.
- Parmesan Cheese – Enhances the savory topping; nutritional yeast can replace it for a vegan option.
- Breadcrumbs – Provides a crunchy topping; panko breadcrumbs yield a lighter, crispier finish.
Feel free to gather these ingredients, and get ready to create a seafood dish that’s sure to warm hearts and bellies alike!
Step‑by‑Step Instructions for Seafood Casserole Recipe
Step 1: Prepare the Seafood
Begin by thawing the scallops if frozen. Peel and devein the shrimp, and break up the crab meat into chunks, ensuring no shell fragments remain. Set aside the prepared seafood as you prepare the flavorful sauce. Prepping the seafood properly ensures it absorbs all the delightful flavors in this Seafood Casserole Recipe.
Step 2: Sauté the Vegetables
In a large skillet, melt 4 tablespoons of butter over medium heat. Add a diced onion and sauté until it becomes translucent, about 5 minutes. Stir in 2 minced garlic cloves, cooking for an additional minute until fragrant. The combination of onion and garlic will create a savory base for your creamy casserole.
Step 3: Create the Creamy Sauce
Pour in 2 cups of heavy cream into the skillet, stirring to combine. Then, add 1 tablespoon of Dijon mustard, 1 tablespoon of Worcestershire sauce, the juice of half a lemon, 1 teaspoon of paprika, and salt and pepper to taste. Let this mixture simmer for 5-7 minutes, allowing it to thicken slightly and meld the flavors together.
Step 4: Add the Seafood
Gently fold the prepared shrimp, scallops, and crab meat into the creamy sauce. Cook over medium heat for about 3-4 minutes, or until the shrimp turn pink and the scallops become opaque. This step is crucial to ensure that the seafood is tender, and not overcooked, maintaining the perfect taste for your Seafood Casserole Recipe.
Step 5: Transfer to Casserole Dish
Preheat your oven to 375°F (190°C). Transfer the seafood and creamy mixture into a greased casserole dish, spreading it out evenly. This will serve as the cozy base of your casserole, so take care to distribute the seafood and sauce well for even baking.
Step 6: Prepare the Topping
In a separate bowl, combine 1 cup of grated cheddar cheese, ½ cup of grated parmesan cheese, and 1 cup of breadcrumbs. Mix until well combined. Evenly sprinkle this cheesy breadcrumb mixture over the seafood layer in the casserole dish, ensuring each bite will have that irresistible crunch.
Step 7: Bake to Golden Perfection
Place the casserole in the preheated oven and bake for 20-25 minutes until the top is golden and crispy. Keep an eye on it; if you desire an extra crispiness, broil for an additional 2-3 minutes. Prepare for a mouthwatering aroma that will fill your kitchen, announcing your Seafood Casserole is nearly ready.
Step 8: Cool and Serve
Once baked, remove the casserole from the oven and let it cool for about 5 minutes to set slightly. Garnish with freshly chopped parsley and thyme for a pop of color and freshness. This final touch not only makes the dish visually appealing but enhances the overall flavor of your Seafood Casserole Recipe.

What to Serve with Creamy Seafood Casserole?
Picture a cozy family gathering where plates are filled with delicious flavors, and laughter fills the air. The creamy and savory seafood delight you’ve prepared is sure to shine, but enhancing it with thoughtful sides will make the meal unforgettable.
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Garlic Bread: The warm, buttery crunch of garlic bread perfectly contrasts the creamy casserole, allowing you to soak up every last bit of the savory sauce.
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Fresh Garden Salad: A bright mix of greens, tomatoes, and cucumbers dresses up your plate, offering a refreshing crunch that complements the richness of the casserole.
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Roasted Vegetables: Roasted seasonal vegetables, with their caramelized flavors, add a delightful earthy element, enriching the seafood experience.
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Quinoa Pilaf: A fluffy quinoa pilaf with herbs and lemon zest brings a nutty taste that balances the creamy texture of the casserole, making each bite delightful.
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White Wine: Pairing your meal with a chilled glass of Chardonnay or Sauvignon Blanc enhances the seafood flavors, making the dining experience feel truly luxurious.
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Lemon Bars: For dessert, the tangy sweetness of lemon bars offers a zesty finish that cleanses the palate and leaves everyone asking for seconds.
Elevate your Seafood Casserole Recipe with these sumptuous pairings, creating a memorable meal that warms both the heart and spirit.
How to Store and Freeze Seafood Casserole
Fridge: Store leftover seafood casserole in an airtight container for up to 3 days. Reheat gently in the oven or microwave, adding a splash of cream to restore creaminess.
Freezer: For longer storage, you can freeze the casserole before baking. Wrap it tightly in plastic wrap and aluminum foil, and it will last up to 2-3 months.
Thawing: To enjoy your frozen seafood casserole, thaw it overnight in the refrigerator before baking. This helps maintain the texture and flavor of the dish.
Reheating: If reheating from frozen, bake it at 375°F (190°C) for about 45-60 minutes, or until fully heated through. Enjoy the flavorful goodness of your seafood casserole!
Make Ahead Options
This Seafood Casserole Recipe is a great option for meal prep! You can prepare the creamy base and seafood mixture up to 24 hours in advance; simply cover and refrigerate it until you’re ready to bake. To maintain its delicious flavor, add the breadcrumb topping just before baking to keep it crispy. When you’re ready to serve, transfer the casserole to a preheated oven (375°F/190°C) and bake for 20-25 minutes, or until the top is golden. This preparation method not only saves you time during busy weeknights but also ensures that the casserole remains just as delicious when it’s time to enjoy!
Expert Tips for Seafood Casserole Recipe
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Don’t Overcook Seafood: Seafood continues to cook during baking, so gently cook it until just done to avoid a rubbery texture.
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Taste the Sauce: Before mixing in the seafood, taste and adjust seasoning as needed; a flavorful sauce is key to a delicious Seafood Casserole Recipe.
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Crispy Finish: For an extra crunchy topping, use panko breadcrumbs and broil the casserole for the last few minutes of cooking—watch closely to prevent burning.
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Use Fresh Ingredients: Fresh seafood and herbs enhance flavor significantly, so avoid frozen or dried options when possible.
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Customize Your Mix: Feel free to add vegetables like spinach or mushrooms for nutritious twists; it’s an easy way to personalize your Seafood Casserole Recipe.
Seafood Casserole Recipe Variations
Feel free to let your creativity run wild and transform this seafood casserole into your family favorite!
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Vegetable Boost: Add spinach or mushrooms for extra nutrition and flavor. The earthy tones of spinach meld beautifully with the creamy base.
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Meat Lovers: Swap the seafood for shredded chicken for a heartier dish. This option is perfect if you want a comforting meal without the seafood.
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Spicy Kick: Incorporate diced jalapeños or a sprinkle of red pepper flakes for a delightful heat that contrasts the creamy sauce.
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Different Cheeses: Experiment with cheeses like goat cheese or feta for a unique flavor profile. Each cheese brings its own character to the dish!
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Seafood Medley: Feel free to mix different seafood like lobster or clams if available. Variety will elevate the dish and impress your guests.
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Gluten-Free: Use crushed gluten-free crackers or oats in place of breadcrumbs for a crunchy topping that everyone can enjoy.
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Cajun Flavor: Add Cajun seasonings for a zesty twist that brightens up the palate. Pair with a fresh salad or garlic bread for balance.
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Crusty Topping: Swap breadcrumbs with crushed potato chips or tortilla chips for an extra crispy layer. A surprising twist that kids will love!
These variations can easily turn your Seafood Casserole Recipe into something special and personalized. And if you’re interested in more comforting dishes, why not try my Cornbread Casserole Cozy or the delicious Cordon Bleu Casserole? The possibilities are limitless!

Seafood Casserole Recipe FAQs
How do I choose the best seafood for my casserole?
Absolutely! When selecting seafood, opt for fresh ingredients whenever possible. Look for shrimp that has a firm texture and a slightly sweet smell; avoid any that have dark spots all over, indicating they may be past their prime. Fresh scallops should be moist and translucent, not dry or sticky. Crab meat should be lump with a sweet scent, ensuring it’s from a reliable source to avoid shell fragments. If using frozen seafood, thaw it properly before cooking to maintain the best texture and flavor.
How long can I store leftovers of the seafood casserole?
Very! Leftover seafood casserole can be stored in the fridge in an airtight container for up to 3 days. When you reheat it, consider adding a splash of heavy cream or milk to restore its creamy consistency, giving it that just-made taste back. If you find that you won’t finish it in that time frame, freezing is a wonderful option!
Can I freeze seafood casserole?
Of course! I often make this Seafood Casserole ahead of time for busy weeks. To freeze, prepare the casserole up to the point of baking, then wrap it tightly with plastic wrap and aluminum foil. It’ll keep in the freezer for up to 2-3 months. Just remember not to bake it first, as that could impact its texture once reheated.
What should I do if the sauce seems too thin?
If your sauce appears too thin, don’t worry! You can thicken it by letting it simmer a bit longer to reduce the liquid or by adding a tablespoon of cornstarch mixed with cold water (a cornstarch slurry) while it’s cooking. Stir until it thickens to your desired consistency. This strategy will help you achieve that luxurious, creamy texture that makes this Seafood Casserole Recipe a family favorite!
What are the best ways to customize the casserole?
The more the merrier! You can easily customize your Seafood Casserole to suit personal preferences. Consider adding sautéed spinach, mushrooms, or even peas for added nutrition and color. Swapping out seafood for alternatives like chicken or a medley of roasted vegetables can also work wonders! Experimenting with various cheeses—like mozzarella or Gruyère—will provide interesting flavor profiles. Just keep the base sauce in mind as you mix and match!
Can my pet consume seafood from the casserole?
In moderation, seafood can be a fun treat for your pet! However, be aware of any allergies they may have—seafood can be a common one. Always remove any seasoning, especially garlic and onions, as these are toxic to pets. A small piece of plain shrimp or crab can be a delightful snack, but as with any human food, make sure to consult your vet to keep your furry friend safe!

Delicious Seafood Casserole Recipe for Cozy Family Nights
Ingredients
Equipment
Method
- Thaw the scallops if frozen. Peel and devein the shrimp, and break up the crab meat into chunks.
- Melt the butter in a large skillet over medium heat. Add diced onion and sauté until translucent, about 5 minutes.
- Stir in minced garlic and cook for an additional minute until fragrant.
- Pour in the heavy cream and stir to combine. Add Dijon mustard, Worcestershire sauce, lemon juice, paprika, and season to taste. Let mix simmer for 5-7 minutes.
- Gently fold in shrimp, scallops, and crab meat; cook until shrimp turns pink and scallops are opaque, about 3-4 minutes.
- Preheat oven to 375°F (190°C) and transfer the mixture into a greased casserole dish.
- Combine cheddar cheese, parmesan cheese, and breadcrumbs in a bowl; sprinkle over the seafood layer.
- Bake for 20-25 minutes until golden and crispy. Broil for an additional 2-3 minutes if desired.
- Let cool for about 5 minutes, garnish with chopped parsley and thyme, then serve.

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