Seafood Mac and Cheese

There are some meals that just feel like a hug, and Seafood Mac and Cheese is one of them. It is rich, creamy, bubbling around the edges, and loaded with tender seafood and plenty of melted cheese. It is the kind of dish that makes everyone wander into the kitchen asking, “Is dinner ready yet?”

I first fell in love with seafood mac and cheese as the kind of meal you make when you want something a little more special than an everyday casserole, but still want the comfort of a familiar family favorite. There is something wonderfully nostalgic about scooping creamy macaroni onto your plate and finding bites of shrimp, crab, or tender scallops tucked between the noodles.

This easy Seafood Mac and Cheese brings those cozy flavors together in one bubbling, cheesy dish. It works beautifully for dinner, Sunday gatherings, potlucks, and holidays when you want a comforting seafood recipe that feels just a little bit fancy.

And the best part? You do not need complicated techniques. A creamy homemade cheese sauce, perfectly cooked pasta, flavorful seafood, and a golden baked topping are all you need.

Why You’ll Love It

Creamy and ultra cheesy

The homemade cheese sauce coats every noodle for that classic, indulgent mac and cheese texture.

Loaded with seafood

Shrimp and crab add sweet, savory bites throughout the casserole.

Perfect comfort food

It has all the cozy appeal of traditional mac and cheese with a delicious seafood twist.

Great for holidays

Serve it alongside your favorite holiday sides for an impressive but approachable meal.

Easy to customize

Use your favorite combination of seafood and cheeses depending on what you have available.

Make-ahead friendly

Prepare parts of the dish ahead of time, then bake when you are ready to serve.

Ingredient Notes & Details

Elbow macaroni: Classic elbow noodles hold onto the creamy sauce beautifully. Shells, cavatappi, or penne also work well.

Shrimp: Use peeled and deveined medium or large shrimp. Fresh or thawed frozen shrimp are both excellent choices.

Crab meat: Lump crab meat gives this dish a sweet, delicate seafood flavor. Check carefully for any remaining shell pieces.

Butter: Use unsalted butter so you can control the seasoning.

All-purpose flour: This creates the roux that thickens the cheese sauce.

Whole milk: Whole milk creates the richest, creamiest result. Half-and-half can make it even more indulgent.

Cheddar cheese: Sharp cheddar gives the sauce plenty of flavor and that classic mac and cheese taste.

Mozzarella: Mozzarella melts beautifully and adds extra stretchiness.

Parmesan: A little Parmesan adds salty, nutty depth.

Garlic and seasonings: Garlic, paprika, black pepper, and a pinch of cayenne complement the seafood without overpowering it.

Breadcrumbs: Panko breadcrumbs create a crisp golden topping. Add Parmesan to the crumbs for an extra flavorful crust.

Step-by-Step Instructions

1. Cook the pasta — 8 to 10 minutes.

Bring a large pot of salted water to a boil. Cook the macaroni until just al dente, following the package directions. Do not overcook it because the pasta will continue cooking in the oven.

Drain well and set aside.

2. Prepare the seafood — about 5 minutes.

Pat the shrimp dry and season lightly with paprika, black pepper, and garlic. Cook in a skillet with a little butter for about 2–3 minutes per side, just until pink and opaque.

Remove from the heat and gently fold in the crab meat.

3. Make the cheese sauce — 8 to 10 minutes.

Melt butter in a saucepan over medium heat. Whisk in the flour and cook for about 1 minute.

Gradually whisk in the milk. Continue stirring until the mixture thickens enough to lightly coat the back of a spoon.

Reduce the heat and stir in cheddar, mozzarella, and Parmesan until completely melted and smooth.

4. Combine everything.

Add the cooked macaroni to the cheese sauce and stir gently until every noodle is coated.

Fold in the cooked seafood carefully so the crab stays in tender pieces.

5. Assemble the casserole.

Transfer everything to a greased baking dish. Sprinkle generously with panko breadcrumbs and a little extra Parmesan.

6. Bake — 20 to 25 minutes.

Bake at 375°F (190°C) until the edges are bubbling and the top is golden brown.

For an extra-crispy finish, broil for 1–2 minutes, watching closely.

Let the Seafood Mac and Cheese rest for about 5 minutes before serving.

FAQ for Common Questions

Can I use frozen seafood for Seafood Mac and Cheese?

Absolutely. Thaw frozen shrimp and crab completely and pat them dry before cooking to prevent excess moisture in the cheese sauce.

What seafood is best for mac and cheese?

Shrimp and crab are especially delicious, but scallops, lobster, crawfish, or cooked salmon can also work beautifully.

Can I make Seafood Mac and Cheese ahead of time?

Yes. Assemble the dish, cover it tightly, and refrigerate it for up to 24 hours before baking.

Why is my seafood mac and cheese watery?

Excess moisture from seafood or under-thickened cheese sauce can cause this. Pat seafood dry and cook the sauce until it noticeably thickens.

What cheese melts best in seafood mac and cheese?

Cheddar, Monterey Jack, Gruyère, mozzarella, and Parmesan are excellent choices. For the smoothest sauce, grate cheese yourself.

Can I make this a low carb or keto Seafood Mac and Cheese?

Yes, with modifications. Replace traditional pasta with cauliflower or another keto-friendly vegetable and use a low-carb thickener if needed.

Storage Tips

Refrigeration

Cool leftovers promptly and store them in an airtight container for 3–4 days. Refrigerate within 2 hours of cooking.

Freezing

Freeze cooled portions in airtight, freezer-safe containers for up to 2 months. Thaw overnight in the refrigerator for the best texture.

Reheating

Reheat gently in the oven at 325°F (165°C) or in the microwave. Add a splash of milk before reheating to help restore the creamy sauce.

Variations

Lobster Mac and Cheese

Replace the shrimp and crab with cooked lobster meat for an especially luxurious holiday version.

Shrimp and Scallop Mac and Cheese

Combine tender shrimp with chopped scallops for a richer seafood combination.

Cajun Seafood Mac and Cheese

Add Cajun seasoning, a little cayenne, and chopped green onion for a bold Southern-inspired variation.

Garlic Butter Seafood Mac and Cheese

Sauté the seafood with extra garlic and butter before folding it into the pasta.

Spinach Seafood Mac and Cheese

Add fresh spinach to the cheese sauce for extra color and a simple vegetable boost.

Extra-Crispy Seafood Mac and Cheese

Use plenty of panko mixed with Parmesan on top for a crunchy contrast to the creamy pasta.

What to Serve with Seafood Mac and Cheese

Fresh Vegetables

A crisp green salad, roasted asparagus, or steamed broccoli balances the richness of the cheese sauce.

Roasted Vegetables

Oven roasted vegetables such as Brussels sprouts, zucchini, or green beans add caramelized flavor and texture.

Fresh Bread

Serve with warm garlic bread or a crusty baguette for soaking up every bit of creamy cheese sauce.

Light Seafood Sides

A simple lemon-dressed salad or grilled vegetables keep the meal fresh without competing with the main dish.

For Holidays

Pair this cheesy seafood side dish with roasted vegetables, a fresh salad, and your favorite holiday main course for a comforting spread everyone will remember.

This Seafood Mac and Cheese is the ultimate creamy comfort food, loaded with tender shrimp, succulent seafood, and plenty of gooey melted cheese. It’s rich, flavorful, and easy to make—perfect for a cozy family dinner, special occasion, or whenever you’re craving a delicious twist on classic mac and cheese!

Prep Time: 15 minutes

Cook Time: 30 minutes

Total Time: 45 minutes

Servings: 6

Ingredients

For the pasta & seafood

• 12 oz (340 g) elbow macaroni or small pasta
• 1 tablespoon olive oil
• 8 oz (225 g) shrimp, peeled, deveined, and chopped
• 6 oz (170 g) lump crab meat
• 4 oz (115 g) scallops, chopped
• 2 cloves garlic, minced
• ½ teaspoon salt
• ¼ teaspoon black pepper
• ½ teaspoon paprika

For the cheese sauce

• 4 tablespoons (56 g) unsalted butter
• ¼ cup (32 g) all-purpose flour
• 3 cups (720 ml) whole milk
• 1 cup (240 ml) heavy cream
• 1 teaspoon Dijon mustard
• ½ teaspoon garlic powder
• ½ teaspoon onion powder
• ½ teaspoon salt
• ¼ teaspoon black pepper
• 1½ cups (170 g) shredded sharp cheddar cheese
• 1 cup (115 g) shredded Monterey Jack cheese
• ½ cup (50 g) shredded Parmesan cheese

For the topping

• ¾ cup (45 g) panko breadcrumbs
• 2 tablespoons melted butter
• 2 tablespoons grated Parmesan
• 1 tablespoon chopped fresh parsley

Instructions

Cook the pasta: Bring a large pot of salted water to a boil. Cook the macaroni until just al dente according to the package directions. Drain and set aside.

Cook the seafood: Heat the olive oil in a large skillet over medium heat. Add the shrimp, scallops, garlic, salt, pepper, and paprika. Cook for about 3–4 minutes, until the shrimp are pink and the scallops are cooked through. Gently fold in the crab meat and cook for another minute. Remove from the heat.

Make the cheese sauce: Melt the butter in a large saucepan over medium heat. Whisk in the flour and cook for about 1 minute. Gradually whisk in the milk and heavy cream until smooth.

Continue cooking for 4–6 minutes, whisking frequently, until the sauce thickens enough to coat the back of a spoon.

Stir in the Dijon mustard, garlic powder, onion powder, salt, and pepper. Reduce the heat to low.

Add the cheddar, Monterey Jack, and Parmesan a handful at a time, stirring until completely melted and smooth.

Combine: Add the cooked pasta and seafood to the cheese sauce. Gently stir until everything is evenly coated.

Prepare the topping: In a small bowl, combine the panko, melted butter, Parmesan, and parsley.

Bake: Transfer the mac and cheese to a greased 9×13-inch baking dish. Sprinkle the breadcrumb mixture evenly over the top.

Bake at 375°F (190°C) for 15–20 minutes, until bubbling around the edges and golden brown on top.

Let it rest for 5 minutes before serving.