Baked Seafood Lasagna with Garlic Butter
This baked seafood lasagna layers tender pasta, sweet shrimp and crab, and a rich garlic butter cream sauce under bubbly melted cheese for the ultimate special occasion dinner.
A Seafood Lasagna Worth Celebrating
If you love the cozy comfort of a classic lasagna casserole but want something a little more special for date night or a holiday table, this baked seafood lasagna is exactly what you need. Tender noodles are layered with sweet shrimp, delicate crab, creamy ricotta, and a rich garlic butter sauce that ties every bite together. It tastes like a restaurant splurge, but it comes together in your own kitchen with ingredients you can find at any grocery store.
This isn't your average seafood bake. The garlic butter cream sauce sets it apart from a standard red sauce lasagna, giving every layer a silky richness that pairs beautifully with the briny sweetness of the shrimp and crab. It's the kind of special dinner that looks impressive but is honestly very approachable, even on a weeknight if you prep the sauce ahead.
Before we get cooking, the right tools and a few quality ingredients really do make this dish shine. A heavy bottomed saucepan helps the garlic butter sauce cook evenly without scorching, and good quality lump crab meat makes a noticeable difference in flavor compared to imitation versions. Here are a few things that genuinely help this recipe come together smoothly.
Why Garlic Butter Makes All the Difference
Most seafood lasagna recipes lean on a plain bechamel or a jarred alfredo, but building the sauce from a garlic butter base changes everything. Cooking the garlic low and slow in butter before whisking in the flour creates a deeply savory foundation, and a splash of dry white wine at the end adds brightness that cuts through the richness of the cream and cheese.
Chef's Tip: Don't rush the roux. Let the butter and flour cook together for a full minute before adding liquid. This removes the raw flour taste and helps the sauce thicken to that perfect, clingy consistency you want between the lasagna layers.
The shrimp and crab are cooked separately and only briefly, just until the shrimp turns pink, so they stay tender and don't turn rubbery during baking. This is one of the most important steps for a seafood bake that doesn't end up overcooked.
Building the Layers
Layering is where this lasagna casserole really comes together. Each layer gets a thin coat of garlic butter sauce, a spread of the lemony ricotta mixture, a scoop of the seafood filling, and a scattering of mozzarella. Repeating this process three times ensures every slice has a balanced mix of pasta, cheese, and seafood in every bite, rather than pockets of filling in just one spot.
A few practical notes that make this easier:
- Cook your noodles just to al dente since they will continue softening in the oven.
- Warm your milk before adding it to the roux so the sauce comes together faster and smoother.
- Don't skip resting the lasagna after baking. Cutting in too early means the layers will slide apart on the plate.
Ready to make it? Here is the full step-by-step recipe:
Baked Seafood Lasagna with Garlic Butter
This baked seafood lasagna layers tender pasta, sweet shrimp and crab, and a rich garlic butter cream sauce under bubbly melted cheese for the ultimate special occasion dinner.
Ingredients
- 12 lasagna noodles, cooked al dente
- 6 tbsp unsalted butter, divided
- 6 cloves garlic, minced
- 1 lb large shrimp, peeled, deveined, and roughly chopped
- 1 lb lump crab meat, picked over for shells
- 3/8 cup all-purpose flour
- 2 cups whole milk, warmed
- 1 cup heavy cream
- 1/2 cup dry white wine, optional, or use extra broth
- 15 oz ricotta cheese, whole milk
- 3 cups mozzarella cheese, shredded, divided
- 1 cup parmesan cheese, finely grated, divided
- 1 large egg
- 1 tbsp fresh lemon juice
- 3 tbsp fresh parsley, chopped, plus more for garnish
- 1/4 tsp red pepper flakes, optional
- 1 tsp salt, plus more to taste
- 1/2 tsp black pepper, freshly cracked
Instruction
Preheat the oven to 375 degrees F (190 degrees C) and lightly grease a 9x13 inch baking dish.
Melt 2 tablespoons of butter in a large skillet over medium heat. Add half the garlic and cook for 30 seconds until fragrant, then add the shrimp and cook for 2 to 3 minutes until just pink. Stir in the crab meat, lemon juice, and 1 tablespoon of parsley, then remove from heat and set aside.
In a saucepan, melt the remaining butter over medium heat. Add the rest of the garlic and cook for 30 seconds, then whisk in the flour and cook for 1 minute to form a paste.
Slowly whisk in the warmed milk, cream, and white wine, whisking constantly until smooth. Simmer for 5 to 7 minutes until thickened, then stir in red pepper flakes, salt, and pepper.
In a bowl, mix the ricotta, egg, half the parmesan, and remaining parsley until combined.
Spread a thin layer of garlic butter sauce in the bottom of the baking dish. Add a layer of noodles, then a layer of ricotta mixture, a portion of the seafood, a portion of the sauce, and a sprinkle of mozzarella.
Repeat the layering process two more times, finishing with a generous layer of sauce topped with the remaining mozzarella and parmesan.
Cover tightly with foil and bake for 25 minutes. Remove the foil and bake for another 15 to 20 minutes until the top is golden and bubbling.
Let the lasagna rest for 10 to 15 minutes before slicing so the layers set. Garnish with fresh parsley and serve warm.
Equipment
- 9x13 inch baking dish
- Large skillet
- Saucepan
- Whisk
- Mixing bowls
- Aluminum foil
Notes
Serving, Storing, and Make-Ahead Tips
This dish is rich enough to stand on its own with just a simple green salad and crusty bread to mop up the extra garlic butter sauce. A crisp white wine, like the same one you used in the sauce, makes a lovely pairing for a special dinner.
For make-ahead convenience, you can fully assemble the lasagna and refrigerate it a day in advance, which makes it perfect for entertaining since most of the work is done before guests arrive. Leftovers reheat well in the oven at a low temperature, though the microwave works fine for a quick lunch the next day. Just avoid high heat, which can cause the delicate cream sauce to break.
Whether you're planning a holiday centerpiece or simply craving one of those comforting easy weeknight dinners with a fancy twist, this baked seafood lasagna with garlic butter delivers every time. It's proof that a few thoughtful upgrades to a classic recipe can turn an everyday casserole into something truly memorable.
