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If you love creamy pasta dishes and comforting family dinners, this Creamy Seafood Lasagna with Shrimp & Crab is a recipe you need to try. Made with tender shrimp, sweet crab meat, creamy ricotta, fresh spinach, and layers of lasagna noodles, this seafood casserole brings restaurant-style flavor straight to your kitchen.
Unlike traditional lasagna made with tomato sauce and ground beef, this version features a rich homemade white sauce with Parmesan cheese and Italian seasoning. Every layer is filled with delicious seafood, melted mozzarella, and creamy cheese for a satisfying meal that feels special without being overly complicated.
Whether you’re preparing a Sunday family dinner, hosting guests, or looking for an elegant holiday meal, this creamy seafood lasagna is a wonderful choice. It’s hearty, cheesy, and packed with coastal-inspired flavors that seafood lovers will appreciate.
Why You’ll Love This Creamy Seafood Lasagna
Rich and creamy texture: The homemade white sauce, ricotta, and mozzarella create a smooth, cheesy filling that keeps every bite delicious.
Loaded with seafood: Shrimp and lump crab meat provide a sweet, delicate flavor that pairs beautifully with Parmesan and garlic.
Fresh spinach in every layer: Spinach adds color, flavor, and a fresh contrast to the rich sauce and cheese.
Perfect for special occasions: This baked seafood lasagna looks impressive enough for entertaining but is simple enough for a weekend family dinner.
Make-ahead friendly: You can prepare several components in advance, making dinner easier when you have guests or a busy schedule.
Ingredients for Creamy Seafood Lasagna with Shrimp & Crab
This recipe uses familiar ingredients to create a comforting seafood dinner. For the best results, prepare all the ingredients before assembling the lasagna.
For the Lasagna
- 12 lasagna noodles
- 1 tablespoon olive oil
For the Seafood Layer
- 1 pound medium shrimp, peeled, deveined, and chopped
- 8 ounces lump crab meat, carefully checked for shells
- 2 cups fresh spinach
For the Creamy White Sauce
- 3 tablespoons butter
- 3 tablespoons all-purpose flour
- 3 cups whole milk
- 1/2 cup grated Parmesan cheese
- 2 cloves garlic, minced
- 1 teaspoon Italian seasoning
- 1/2 teaspoon salt, or to taste
- Black pepper, to taste
For the Cheese Mixture
- 1 cup ricotta cheese
- 1 large egg
- 2 cups shredded mozzarella cheese
Ingredient Notes and Substitutions
Shrimp: Medium shrimp work well because they distribute evenly throughout the layers. Fresh or frozen shrimp can be used. If using frozen shrimp, thaw them completely and pat them dry before cooking.
Crab meat: Lump crab meat provides a sweet, delicate seafood flavor. Fresh, refrigerated, or canned crab meat can work, provided it is properly drained and checked for shell fragments.
Fresh spinach: Two cups of fresh spinach add color and balance the richness of the sauce. Baby spinach is especially convenient because it has tender leaves and requires little preparation.
Ricotta cheese: Ricotta creates a creamy layer that complements the seafood. Whole-milk ricotta provides a richer texture, while part-skim ricotta also works.
Mozzarella cheese: Low-moisture, part-skim mozzarella melts beautifully and creates a golden, cheesy topping. Shred it yourself for especially good melting.
Whole milk: Whole milk gives the white sauce a smooth, rich consistency. Two-percent milk can be substituted, although the sauce may be slightly less creamy.
Equipment You’ll Need
- 9 × 13-inch baking dish
- Large pot for cooking the noodles
- Skillet for the shrimp
- Medium saucepan for the white sauce
- Mixing bowl
- Whisk and spatula
- Aluminum foil
Instructions for Making Creamy Seafood Lasagna with Shrimp & Crab
Step 1: Prepare the Oven and Noodles
Preheat your oven to 375°F (190°C). Lightly grease a 9 × 13-inch baking dish.
Bring a large pot of salted water to a boil. Cook the lasagna noodles according to the package directions until al dente. Drain carefully and lay the noodles flat so they do not stick together.
Avoid overcooking the noodles because they will continue to soften while baking.
Step 2: Cook the Shrimp
Heat the olive oil in a skillet over medium heat. Add the peeled, deveined, and chopped shrimp in an even layer.
Cook for approximately 2–3 minutes per side, or just until the shrimp turn pink and opaque. Avoid overcooking because the shrimp will be heated again in the oven.
Remove the shrimp from the skillet and let them cool slightly. Gently combine them with the lump crab meat, taking care not to break the crab into very small pieces.
Step 3: Make the Creamy White Sauce
Melt the butter in a medium saucepan over medium heat. Add the minced garlic and cook for about 30 seconds until fragrant.
Whisk in the flour and cook for approximately one minute to form a smooth roux. Gradually pour in the milk, whisking continuously to prevent lumps.
Continue cooking for 4–6 minutes, stirring frequently, until the sauce thickens enough to coat the back of a spoon.
Stir in the Parmesan cheese, Italian seasoning, salt, and black pepper. Remove the saucepan from the heat once the cheese has melted and the sauce is smooth.
Step 4: Prepare the Ricotta Mixture
In a mixing bowl, combine the ricotta cheese and egg. Stir until smooth and evenly blended.
The egg helps the ricotta layer hold its shape after baking, making it easier to cut neat portions of lasagna.
If the ricotta seems particularly thick, stir in a small spoonful of the prepared white sauce to make it easier to spread.
Step 5: Prepare the Spinach
Wash the fresh spinach if needed and dry it thoroughly.
For a more evenly distributed filling, briefly wilt the spinach in a skillet over medium heat. Let it cool slightly, then gently squeeze out excess moisture.
This step is especially helpful if the spinach leaves are large or contain a lot of water. Removing excess moisture helps prevent a watery seafood lasagna.
Step 6: Assemble the Seafood Lasagna
Spread a thin layer of white sauce over the bottom of the prepared baking dish.
Arrange a layer of lasagna noodles on top. Spread some of the ricotta mixture over the noodles, followed by a portion of the shrimp and crab mixture, fresh spinach, white sauce, and shredded mozzarella.
Repeat the layers until the ingredients are used, dividing them as evenly as possible. Finish with the remaining white sauce and mozzarella cheese.
For an especially flavorful topping, reserve a small amount of Parmesan to sprinkle over the cheese before baking.
Step 7: Bake Until Golden and Bubbly
Cover the baking dish with aluminum foil, keeping it slightly tented so it does not stick to the cheese.
Bake for 25 minutes. Remove the foil and continue baking for another 15–20 minutes, until the cheese is melted, golden, and bubbling around the edges.
The center should be hot throughout. If you use a food thermometer, check that the center reaches 165°F (74°C) before serving.
Step 8: Rest and Serve
Remove the lasagna from the oven and let it rest for 10–15 minutes before slicing.
This resting time allows the creamy sauce and cheese layers to settle, making the portions easier to serve.
Cut into squares and serve warm. Add a little chopped fresh parsley if desired, and pair the lasagna with a crisp green salad or roasted vegetables.
Tips for the Best Seafood Lasagna
Do not overcook the shrimp. Cook them only until pink and opaque before assembling. This helps preserve their tender texture.
Drain the crab meat well. Excess liquid can thin the white sauce and make the finished casserole watery.
Control moisture from the spinach. Fresh spinach releases water as it cooks, so wilting and draining it beforehand can improve the final texture.
Make a smooth white sauce. Add the milk gradually while whisking. This helps prevent lumps and creates a silky sauce for the layers.
Let the lasagna rest. Cutting it immediately after baking can cause the layers to slide apart. A short resting period makes a noticeable difference.
Use freshly shredded cheese when possible. Freshly shredded mozzarella generally melts more smoothly than many pre-shredded varieties.
What to Serve with Seafood Lasagna
Because this creamy seafood lasagna is rich and satisfying, lighter side dishes make excellent companions.
- Garlic bread: A crisp, buttery side is perfect for soaking up extra white sauce.
- Caesar salad: Crisp romaine, Parmesan, and a tangy dressing balance the creamy lasagna.
- Roasted asparagus: Tender asparagus adds freshness without making the meal feel too heavy.
- Steamed green beans: A simple vegetable side provides color and a clean, fresh flavor.
- Lemon-dressed mixed greens: A bright citrus dressing complements the natural sweetness of the shrimp and crab.
For a complete dinner, serve the lasagna with a green salad and warm garlic bread.
Make-Ahead and Storage Tips
Make ahead: Prepare the white sauce, cook the seafood, and mix the ricotta filling in advance. Store the components separately in the refrigerator and assemble the lasagna when you’re ready to bake.
You can also assemble the casserole ahead of time and refrigerate it, provided the seafood has been handled safely and kept cold. For the best texture and food safety, bake it within 24 hours. If baking directly from the refrigerator, allow extra time as needed and check that the center is thoroughly heated.
Refrigerate leftovers: Transfer leftover lasagna to an airtight container and refrigerate within two hours of cooking. Eat within 3–4 days.
Reheat: Warm individual portions in the microwave or cover the lasagna and reheat it in a 350°F oven until hot throughout. Add a small spoonful of milk or white sauce if the edges appear dry.
Freeze carefully: You can freeze cooked portions in airtight, freezer-safe containers for approximately 2–3 months for best quality. Thaw in the refrigerator before reheating. The creamy sauce may change texture slightly after freezing.
Frequently Asked Questions
Can I use frozen shrimp for seafood lasagna?
Yes. Thaw frozen shrimp completely in the refrigerator or according to the package directions. Pat them dry before cooking to remove excess moisture.
Can I use imitation crab meat?
Yes. Imitation crab can be used as a budget-friendly substitute for lump crab meat. It has a different texture and flavor, but it still pairs well with shrimp and creamy white sauce.
Can I make seafood lasagna without spinach?
Absolutely. You can omit the spinach or replace it with a smaller amount of cooked, well-drained mushrooms. Keep in mind that the flavor and moisture level will change slightly.
Why is my seafood lasagna watery?
Excess liquid may come from wet spinach, poorly drained crab meat, or a white sauce that is too thin. Drain the seafood, remove excess moisture from the spinach, and cook the sauce until it thickens before assembling.
How do I know when seafood lasagna is done?
The cheese should be golden and bubbling, and the center should be hot throughout. For a reliable food-safety check, the center should reach 165°F (74°C).
Can I prepare seafood lasagna the night before?
Yes. Assemble it, cover it, and refrigerate it promptly. Bake within 24 hours for the best results, allowing additional baking time if it is still cold when placed in the oven.
Final Thoughts
This Creamy Seafood Lasagna with Shrimp & Crab combines tender seafood, fresh spinach, creamy ricotta, and a rich Parmesan white sauce in one delicious baked casserole. With its golden mozzarella topping and comforting layers, it is a wonderful alternative to traditional meat lasagna.
Serve it for a family dinner, a holiday gathering, or any occasion when you want to prepare something a little more special. Pair it with garlic bread and a fresh salad for a satisfying meal everyone can enjoy.
If you try this recipe, save it to your Pinterest dinner board so you can find it again whenever you’re craving a creamy, cheesy seafood dinner.
PrintCreamy Seafood Lasagna with Shrimp & Crab
Creamy seafood lasagna layered with tender shrimp, sweet crab, ricotta, fresh spinach, and a rich Parmesan white sauce, topped with golden melted mozzarella.
- Prep Time: 25 minutes
- Cook Time: 40-45 minutes
- Total Time: 1 hour 20 minutes
- Yield: 8 servings
- Category: Dinner
- Method: Baked
- Cuisine: American, Italian-Inspired
Ingredients
12 lasagna noodles
1 tbsp olive oil
1 lb medium shrimp, peeled, deveined, and chopped
8 oz lump crab meat, drained and checked for shells
2 cups fresh spinach
3 tbsp butter
3 tbsp all-purpose flour
3 cups whole milk
1/2 cup grated Parmesan cheese
2 cloves garlic, minced
1 tsp Italian seasoning
1/2 tsp salt
Black pepper, to taste
1 cup ricotta cheese
1 large egg
2 cups shredded mozzarella cheese
Instructions
1. Preheat oven to 375°F (190°C). Grease a 9 x 13-inch baking dish.
2. Cook lasagna noodles until al dente. Drain and set aside.
3. Heat olive oil and cook shrimp until pink and opaque. Combine with crab meat.
4. Melt butter, sauté garlic, whisk in flour, then gradually add milk. Cook until thickened.
5. Stir in Parmesan, Italian seasoning, salt, and black pepper.
6. Mix ricotta with egg until smooth.
7. Wilt spinach briefly and drain excess moisture.
8. Layer sauce, noodles, ricotta, seafood, spinach, and mozzarella. Repeat layers.
9. Top with remaining sauce and mozzarella.
10. Cover with foil and bake for 25 minutes. Uncover and bake 15–20 minutes until golden and bubbly.
11. Rest for 10–15 minutes before slicing and serving.
Notes
Use thawed, well-drained shrimp and crab to prevent excess moisture.
Drain spinach thoroughly before layering.
Avoid overcooking the shrimp before baking.
Refrigerate leftovers in an airtight container for 3–4 days.
Reheat until the center reaches 165°F (74°C).