
This seafood lasagna layers tender shrimp and crab with creamy cheeses and a luscious white sauce for a comforting showstopper. Every bite is velvety and packed with rich coastal flavor. It is one of my favorite dishes when I want something a little fancy but totally satisfying and homey.
I first tried this recipe for a special birthday dinner and it quickly became my go-to comfort dish on chilly evenings. People always ask for seconds and the leftovers are just as delicious.
Ingredients
- Lasagna noodles: look for ones that hold their structure after boiling fresh pasta sheets also work great
- Cooked shrimp: adds juicy bites and a slightly sweet seafood flavor choose medium shrimp and be sure they are peeled and deveined
- Crab meat: gives a delicate richness fresh lump crab is best but drained canned works in a pinch
- Butter: helps create a flavorful base for the cream sauce use real butter for best taste
- Garlic: brightens everything up fresh cloves make a big difference
- All-purpose flour: thickens the sauce and keeps it silky
- Whole milk and heavy cream: together they make the sauce incredibly smooth and rich
- Parmesan cheese: adds a nutty savory depth always grate it fresh for optimal melting
- Mozzarella cheese: creates gooey cheesy layers choose the best quality you can find
- Ricotta cheese: brings creaminess and a nice contrast layer whole milk ricotta is extra smooth
- Chopped fresh parsley: offers color and a fresh pop of flavor optional but recommended
- Salt and black pepper: essential for seasoning taste and adjust as you go
- Red pepper flakes: bring a gentle heat use only if you like a little kick
Step-by-Step Instructions
- Prepare the Sauce:
- Melt butter in a large saucepan over medium heat until it is foamy but not browned Add minced garlic and cook for about one minute just until the aroma fills your kitchen Stir in the flour and whisk steadily so there are no lumps Let this cook for another full minute to build a subtle nutty flavor Now slowly pour in the milk and heavy cream while whisking constantly Keep whisking and cook until the mixture thickens to a sauce that coats the back of a spoon
- Add the Cheese:
- Lower the heat as the sauce thickens Sprinkle in the freshly grated Parmesan and keep stirring until it melts into the sauce Add salt and plenty of cracked black pepper Taste and add a pinch of red pepper flakes if you want a gentle back note of spice
- Seafood Mixture:
- Gently fold the cooked shrimp and crab into the warm sauce Stir just until seafood is evenly coated Let it all simmer for two minutes to meld the flavors but do not overcook Remove pan from heat
- Assemble the Lasagna:
- Set your oven to 375 degrees F to preheat Grab a 9 by 13 inch baking dish and spoon a thin layer of the seafood sauce to cover the bottom Arrange three lasagna noodles over the sauce Spoon on more sauce dot with dollops of ricotta and scatter mozzarella cheese evenly Repeat these layers two more times Finish with a final generous layer of sauce and mozzarella across the top for a bubbly top
- Bake:
- Cover the baking dish tightly with foil to prevent drying out Bake for twenty five minutes to allow everything to heat through Remove foil and bake an additional ten to fifteen minutes until the cheese is golden and edges are bubbling
- Garnish and Serve:
- Let the lasagna sit for ten minutes before slicing It will set up and be easier to serve Sprinkle with fresh parsley if you have it This dish is absolutely delicious with garlic bread and a crisp green salad

My favorite part is the sweet brininess of the crab with the creamy sauce It reminds me of beach vacations with my family when my dad would show off his famous seafood lasagna Everyone would gather in the kitchen to sneak a taste before dinner
Storage Tips
Cool leftovers completely before covering tightly with foil or plastic wrap Keep refrigerated up to three days For longer storage slice and freeze portions in airtight containers Lasagna reheats nicely in the oven or microwave just be sure to cover so it stays moist
Ingredient Substitutions
If you cannot find crab swap with extra shrimp or even a bit of scallops in small pieces For a lighter sauce substitute half and half for the cream Try part skim ricotta or mozzarella for a slightly lighter bite If you need gluten free use your favorite GF lasagna noodles and a one for one gluten free flour blend in the sauce
Serving Suggestions
Garlic bread is almost required for soaking up the creamy sauce I also love serving this with roasted asparagus or a tangy arugula salad A glass of crisp white wine like Sauvignon Blanc or Pinot Grigio pairs beautifully making dinner feel extra special
Cultural Historical Context
Seafood lasagna is not traditional to Italy but takes inspiration from northern Italian cream sauces and American coastal cooking It is popular in home kitchens for festive occasions and feels especially right in the spring or early summer when seafood is freshest
Frequently Asked Questions
- → Can I use frozen seafood for this dish?
Yes! Thaw and drain any frozen shrimp or crab thoroughly to prevent excess moisture affecting the sauce and texture.
- → Is there a substitute for crab meat?
Imitation crab can work, or substitute with extra shrimp or even cooked scallops for a different seafood pairing.
- → How can I make this ahead of time?
Assemble fully, cover, and refrigerate up to 24 hours before baking. Bake as directed, adding a few extra minutes if needed.
- → What sides complement this main dish?
Garlic bread, a crisp green salad, or roasted vegetables pair beautifully, balancing the creamy, rich flavors.
- → How should leftovers be stored?
Keep tightly covered in the refrigerator for up to 3 days. Reheat portions gently in the oven or microwave until warmed through.