Seafood Lasagna Shrimp Crab

Featured in Hearty Main Courses.

This dish layers succulent shrimp and tender crab with creamy béchamel, ricotta, and mozzarella between sheets of pasta for a coastal spin on a classic comfort favorite. A delicate blend of Parmesan and fresh herbs enhances each bite, while a golden finish delivers irresistible appeal. Perfect for celebratory gatherings or a cozy family meal, this savory main is both elegant and deeply satisfying. Pair with a fresh green salad and chilled white wine for a truly memorable experience.

Casey
Updated on Fri, 11 Jul 2025 18:25:59 GMT
A casserole dish with shrimp and cheese. Pin it
A casserole dish with shrimp and cheese. | cookingwithcasey.com

This luscious seafood lasagna layers sweet shrimp and crab with creamy ricotta, nutty Parmesan, and a silky béchamel sauce. It is my go-to when I want to impress dinner guests or just bring a taste of the coast to my kitchen table.

The first time I made this was for a holiday potluck when I wanted something a little fancier than classic lasagna. It disappeared in minutes and I have been asked to bring it again and again ever since.

Ingredients

  • Cooked shrimp: gives the lasagna a sweet ocean flavor and is easy to prepare ahead
  • Lump crab meat: adds delicate seafood taste and elevates the dish choose real crab for the best result but quality imitation works in a pinch
  • Ricotta cheese: brings a creamy texture and rich base for the filling always look for whole milk ricotta with minimal ingredients
  • Egg: acts as a binder to hold the filling together opt for fresh eggs from a reliable source
  • Grated Parmesan cheese: adds salty nutty depth always grate fresh if you can
  • Garlic powder and onion powder: infuse the mixture with savory flavor without overpowering the seafood
  • Salt and pepper: for seasoning use kosher salt and fresh ground pepper if possible
  • Chopped parsley: gives freshness and color fresh parsley livens up the finished dish
  • Butter: forms the base of the white sauce for richness use unsalted to control the saltiness
  • All purpose flour: thickens the béchamel creating a stable creamy sauce
  • Milk: brings the béchamel together use whole milk for the richest flavor and texture warm before adding to the roux
  • Nutmeg: gives classic warmth to the white sauce grate fresh nutmeg for delicate fragrance
  • Lasagna noodles: create the structure of the dish cook until just al dente so they absorb sauce without turning mushy
  • Shredded mozzarella cheese: melts for gooey layers and a golden top whole milk mozzarella gives the best melt
  • Optional Gruyere or Fontina cheese: add even more richness and a hint of nuttiness if you want extra decadence

Step by Step Instructions

Make the White Sauce:
Melt butter in a medium saucepan over medium heat until foaming then sprinkle in the flour and vigorously whisk for about one minute until the mixture looks smooth and smells slightly nutty. Gradually pour in warm milk in small additions whisking constantly after each addition until no lumps remain. Keep whisking for five to seven minutes until the sauce is thick enough to coat the back of your spoon. Season the sauce with salt pepper and nutmeg then stir in Parmesan until melted and set the pan aside off the heat.
Prepare the Seafood Filling:
Place ricotta cheese in a large mixing bowl then add the egg Parmesan garlic powder onion powder chopped parsley salt and pepper. Beat briskly until everything is completely blended. Very gently fold in the chopped shrimp and crab meat to keep the seafood in nice pieces and not overmixed.
Assemble the Lasagna:
Heat your oven to three hundred seventy five degrees Fahrenheit. Lightly grease a nine by thirteen inch baking dish and smooth a very thin layer of béchamel over the bottom to prevent sticking. Lay three noodles across the pan then spoon a third of the seafood filling on top spreading it evenly. Drizzle generously with white sauce and scatter on a layer of mozzarella. Repeat this layering process two more times using all the filling and most of the cheese. Top with the last layer of noodles cover with the remaining béchamel and finish with the rest of the mozzarella plus Gruyere or Fontina if using.
Bake:
Cover the baking dish loosely with foil making sure it does not touch the cheese. Bake for thirty minutes then remove the foil and bake for another ten to fifteen minutes until the top is bubbling and golden brown. Remove from the oven and allow the lasagna to rest uncovered for ten minutes so it sets and slices cleanly.
A cheese and chicken casserole with a side of bread. Pin it
A cheese and chicken casserole with a side of bread. | cookingwithcasey.com

I love choosing a good Gruyere to finish the top because of its nutty flavor and golden color once baked. My family always gathers around the kitchen island when it comes bubbling out of the oven and it never fails to spark conversation and requests for seconds.

Storage Tips

Let the lasagna cool completely then wrap tightly in plastic wrap or foil. Refrigerate for up to three days. For longer storage slice into portions individually wrap each and freeze for up to two months. Reheat from chilled or frozen in a moderate oven until hot throughout and the cheese is bubbly.

Ingredient Substitutions

If fresh shrimp or crab are out of budget or season substitute with good quality frozen options making sure to drain very well to avoid excess moisture in the filling. Cottage cheese can stand in for ricotta but may produce a looser filling. Mozzarella can be swapped for provolone or a blend of Italian cheeses for a twist.

Serving Suggestions

Serve big squares of this lasagna with a simple green salad and crisp white wine for a dinner party. It also pairs nicely with roasted asparagus or broccolini. Add a crusty baguette for soaking up any extra sauce.

Cultural Inspiration

Seafood lasagna is a coastal Italian American twist on the classic dish inspired by the bounty of the sea. In regions along the Italian coast seafood replaces the red sauce and ground meat for special occasions or festive gatherings.

Frequently Asked Questions

→ Can I use imitation crab for this dish?

Yes, high-quality imitation crab can be substituted, though real crab offers the best flavor and texture.

→ How should I prepare the shrimp?

Cook, peel, and devein the shrimp before chopping them into bite-sized pieces for even distribution.

→ Can I make this ahead of time?

Absolutely. Assemble the dish, cover, and refrigerate up to a day in advance. Bake just before serving.

→ What’s the best cheese blend for the topping?

Mozzarella provides meltiness. Adding Gruyère or Fontina delivers extra richness and a nutty flavor.

→ How do I prevent watery layers?

Drain seafood well and use boiled or oven-ready noodles to reduce excess moisture in the final bake.

→ What sides go well with this?

Pair with a crisp green salad, steamed vegetables, or garlic bread for a balanced, complete meal.

Seafood Lasagna Shrimp Crab

Creamy layers of shrimp, crab, ricotta, and mozzarella create a luscious baked Italian-inspired comfort dish.

Prep Time
40 Minutes
Cook Time
45 Minutes
Total Time
85 Minutes
By: Casey

Category: Hearty Main Dishes

Difficulty: Intermediate

Cuisine: Italian-American

Yield: 8 Servings (1 large baking dish)

Dietary: ~

Ingredients

→ Seafood Filling

01 450 g cooked shrimp, peeled, deveined, and chopped
02 225 g lump crab meat, real or high-quality imitation
03 500 ml ricotta cheese
04 1 large egg
05 50 g grated Parmesan cheese
06 1 teaspoon garlic powder
07 1 teaspoon onion powder
08 Salt and freshly ground black pepper, to taste
09 2 tablespoons chopped parsley, fresh or dried

→ White Sauce (Béchamel)

10 60 g unsalted butter
11 40 g all-purpose flour
12 720 ml whole milk, warmed
13 1/4 teaspoon ground nutmeg
14 Salt and freshly ground black pepper, to taste
15 50 g grated Parmesan cheese

→ Lasagna Assembly

16 9 lasagna noodles, cooked and drained or oven-ready
17 200 g shredded mozzarella cheese
18 Optional: 50 g grated Gruyère or Fontina cheese

Instructions

Step 01

Melt butter in a medium saucepan over medium heat. Add flour and whisk continuously for 1 minute to form a roux. Gradually pour in the warm milk while whisking until the mixture is smooth and thickened, about 5–7 minutes. Season with salt, pepper, and nutmeg. Stir in Parmesan cheese, then remove from heat and set aside.

Step 02

In a large mixing bowl, combine ricotta cheese, egg, Parmesan, garlic powder, onion powder, parsley, salt, and pepper. Gently fold in the chopped shrimp and crab meat, ensuring even distribution without breaking up the seafood.

Step 03

Preheat the oven to 190°C (375°F). Lightly grease a 33 x 23 cm baking dish. Spread a thin layer of white sauce over the base. Arrange 3 lasagna noodles on top, followed by one-third of the seafood filling. Drizzle with white sauce and sprinkle with mozzarella. Repeat this layering process two more times. Top with the final layer of noodles, the remaining white sauce, and a generous amount of mozzarella and Gruyère (if using).

Step 04

Cover the dish loosely with foil and bake for 30 minutes. Remove the foil and continue baking for 10–15 minutes, or until the top is golden and bubbling. Remove from oven and allow to rest for 10 minutes before portioning and serving.

Notes

  1. Garnish with fresh parsley or basil before serving for added freshness.
  2. Pair with a crisp green salad, steamed asparagus, or a glass of chilled white wine such as Sauvignon Blanc or Pinot Grigio.

Tools You'll Need

  • Medium saucepan
  • Large mixing bowl
  • Whisk
  • 33 x 23 cm (9 x 13-inch) baking dish
  • Aluminium foil
  • Oven

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Contains dairy (cheese, milk, butter, ricotta)
  • Contains shellfish (shrimp, crab)
  • Contains egg
  • Contains gluten (lasagna noodles, flour)

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 460
  • Total Fat: 22 g
  • Total Carbohydrate: 35 g
  • Protein: 34 g