Crab and Shrimp Casserole Recipe Creamy and Easy

Crab and Shrimp Casserole with a Moroccan Twist – Creamy, Cheesy & Irresistible

Every time I make this Crab and Shrimp Casserole, I’m transported back to my mother’s kitchen in Morocco. The aroma of garlic, butter, and warm spices mingling with the briny sweetness of fresh seafood — it’s pure comfort. But this isn’t just any seafood casserole. My version brings a subtle Moroccan warmth with a pinch of cumin and paprika, a technique I learned watching my mother prepare tagines. That unique angle — blending classic creamy casserole comfort with North African spice — is what makes this dish unforgettable. Living in New York City, I’ve had the privilege of sourcing incredible seafood at the Chelsea Market fish counters, and this recipe showcases those beautiful flavors in the most soul-satisfying way.

Imagine tender shrimp, sweet lump crabmeat, and a luscious Parmesan cream sauce, all baked under a golden, bubbly crust. Each spoonful delivers layers of texture: the delicate flake of crab, the juicy pop of shrimp, and the rich, velvety sauce clinging to every bite. The spice blend — just a whisper of cumin, a touch of smoky paprika, and a hint of cayenne — doesn’t overpower the seafood. Instead, it elevates it, adding a warmth that feels both familiar and exciting. I love how the top browns into a crispy, cheesy crown while the inside stays luxuriously creamy. It’s the kind of dish that makes you close your eyes and savor the moment.

What sets my Crab and Shrimp Casserole apart is the technique I brought back from culinary school in Paris: a perfectly built béchamel base that stays silky even after baking. No grainy sauces here — just smooth, rich creaminess every time. I also sneak in a special pro tip about how to avoid watery casserole (it’s all about pre-cooking the shrimp just right). One common mistake home cooks make is overcooking the seafood before baking, which turns everything rubbery. I’ll show you exactly how to nail it. Whether you’re serving this for a holiday dinner, a Sunday family meal, or a cozy weeknight indulgence, this recipe is destined to become a favorite.

Why This Crab and Shrimp Casserole Recipe Is the Best

The Flavor Secret. The magic begins with a spice blend inspired by my Moroccan roots — cumin, smoked paprika, and a pinch of cinnamon. These spices don’t compete with the seafood; they hug it. Combined with a rich, garlicky cream sauce and two types of melted cheese, every bite is layered with savory depth. My Parisian training taught me how to balance flavors precisely, and that precision makes this Crab and Shrimp Casserole sing. The sweetness of the crab and shrimp plays beautifully against the warm, earthy spices.

Perfected Texture. Nothing ruins a seafood casserole faster than a watery, thin sauce or rubbery shrimp. I’ve perfected the technique: I pre-cook the shrimp just until pink, then fold them into a properly thickened béchamel. The crab is added gently at the end to preserve its delicate texture. A final bake under the broiler gives you that irresistible golden crust while the inside stays luscious and creamy. The contrast between the crispy top and the velvety interior is pure chef’s kiss.

Foolproof & Fast. Despite its elegant presentation, this Crab and Shrimp Casserole comes together in under an hour. The steps are straightforward — make the sauce, cook the shrimp, assemble, bake. I’ve tested this recipe dozens of times in my tiny NYC kitchen, and it works beautifully for beginners and experienced cooks alike. Plus, it can be prepped a day ahead, making it perfect for entertaining. You get restaurant-quality results without the stress.

Crab and Shrimp Casserole Ingredients

When I shop for this Crab and Shrimp Casserole, I head straight to the seafood counter at Citarella in NYC, or my local Whole Foods. The key is freshness — especially for the shrimp and crab. I still remember my mother sending me to the Marrakech souk with a woven basket to pick up fresh seafood for Friday couscous. Here’s what you’ll need for this beautiful dish.

Ingredients List

• 1 lb large shrimp, peeled and deveined
• 8 oz lump crabmeat, picked over for shells
• 4 tbsp unsalted butter
• 1 small onion, finely diced
• 3 cloves garlic, minced
• 1/4 cup all-purpose flour
• 2 cups whole milk, warmed
• 1/2 cup heavy cream
• 1 tsp ground cumin
• 1 tsp smoked paprika
• 1/4 tsp ground cinnamon
• 1/8 tsp cayenne pepper (optional)
• 1 tsp salt, plus more to taste
• 1/2 tsp black pepper
• 1 cup grated Parmesan cheese
• 1 cup shredded mozzarella cheese
• 1/3 cup panko breadcrumbs
• 2 tbsp fresh parsley, chopped (for garnish)
• 1 lemon, cut into wedges (for serving)

Ingredient Spotlight

Lump Crabmeat — This is the star of the show. Look for fresh lump crabmeat in the refrigerated section of your grocery store. It has a sweet, delicate flavor and beautiful large flakes. I prefer wild-caught blue crab from the Gulf or Atlantic. If you can’t find lump crabmeat, canned crabmeat (drained and picked over) works in a pinch, though the texture will be less flaky. For a more affordable option, you can use surimi (imitation crab), but the flavor won’t be as rich.

Shrimp — Large shrimp (21–25 count per pound) give the best bite. I buy wild-caught American shrimp whenever possible. To save time, you can buy pre-peeled and deveined shrimp. The key is not to overcook them — they’ll finish cooking in the oven. Fresh or frozen both work; if frozen, thaw overnight in the fridge and pat very dry before cooking.

Moroccan Spice Blend — The cumin, smoked paprika, and cinnamon are what make this Crab and Shrimp Casserole special. Cumin adds an earthy warmth, smoked paprika brings a subtle smokiness, and cinnamon offers a faint sweet warmth that’s traditional in North African cooking. Don’t skip them — they don’t scream “Moroccan,” they just make everything taste deeper and more interesting. You can find these spices at any well-stocked grocery store.

Cheese — Parmesan adds salty, nutty depth to the sauce, while mozzarella gives that beautiful stretchy, gooey texture. I recommend freshly grating Parmesan from a block — pre-shredded versions have anti-caking agents that can make the sauce grainy. For the mozzarella, low-moisture part-skim shreds work best. You can substitute Gruyère or provolone for a different flavor profile.

How to Make Crab and Shrimp Casserole — Step-by-Step

Trust me, this Crab and Shrimp Casserole is easier than it looks. Follow these steps, and you’ll have a golden, bubbly, crowd-pleasing dish that tastes like you spent hours in the kitchen.

Step 1: Prep the Seafood

Pat the shrimp dry with paper towels and season with a pinch of salt and pepper. Gently pick through the lump crabmeat to remove any stray pieces of shell or cartilage, being careful not to break up the beautiful large chunks. Set both aside while you build the sauce.

💡 Olga’s Pro Tip: Pat the shrimp thoroughly dry before cooking. Excess moisture is the number one enemy of a creamy casserole — it dilutes the sauce and makes everything watery.

Step 2: Build the Moroccan-Spiced Béchamel

In a large skillet or Dutch oven, melt the butter over medium heat. Add the diced onion and cook until soft and translucent, about 4–5 minutes. Add the minced garlic and cook for 30 seconds until fragrant. Sprinkle in the flour and whisk constantly for 1–2 minutes — this cooks out the raw flour taste. Slowly pour in the warmed milk while whisking vigorously to prevent lumps. Bring to a gentle simmer; the sauce will thicken after 2–3 minutes. Stir in the heavy cream, cumin, smoked paprika, cinnamon, cayenne (if using), salt, and pepper.

⚠️ Common Mistake to Avoid: Adding cold milk to the hot butter-flour mixture will create lumps. Always warm your milk before adding it — I microwave mine for 45 seconds. This ensures a silky-smooth béchamel every time.

Step 3: Cook the Shrimp

In a separate non-stick skillet, heat a drizzle of olive oil over medium-high heat. Add the seasoned shrimp and cook for 1–2 minutes per side, just until they turn pink and are no longer translucent. They will finish cooking in the oven, so don’t overdo it here. Remove from heat and let cool slightly.

💡 Olga’s Pro Tip: Cook the shrimp in a single layer — don’t crowd the pan. If they’re piled on top of each other, they’ll steam instead of sear, and you’ll lose that beautiful caramelized flavor.

Step 4: Assemble the Casserole

Preheat your oven to 375°F. In a large bowl, gently combine the béchamel sauce, cooked shrimp, and half of the lump crabmeat (reserve the larger, prettiest chunks for the top). Fold carefully to avoid breaking the crab. Transfer the mixture to a greased 9×13-inch baking dish. Scatter the remaining lump crabmeat over the top. Sprinkle the Parmesan and mozzarella cheeses evenly across the surface. Finally, sprinkle the panko breadcrumbs over the cheese.

⚠️ Common Mistake to Avoid: Over-stirring the crab into the sauce breaks it into tiny shreds. Fold gently with a rubber spatula, using a cutting motion rather than a stirring motion. You want to see generous chunks of crab in every bite.

Step 5: Bake and Broil

Bake the Crab and Shrimp Casserole for 25 minutes, until the sauce is bubbly around the edges and the cheese is melted. Then switch the oven to broil and cook for 2–3 more minutes, watching carefully, until the breadcrumbs and cheese are golden brown and crisp. Remove from the oven and let rest for 5 minutes before serving. Garnish with fresh parsley and serve with lemon wedges.

💡 Olga’s Pro Tip: Keep a close eye on the casserole under the broiler — it can go from golden to burnt in 30 seconds. I like to position the dish on the middle rack, not the top, for more even browning without burning.

Serving & Presentation

This Crab and Shrimp Casserole is stunning straight out of the oven. I like to serve it family-style, right from the baking dish, with a big salad and crusty bread on the side. The golden, bubbly top with those little peaks of crab and toasted panko is so inviting. For a more elegant presentation, spoon individual portions onto warm plates, making sure each serving gets some of the crispy top and creamy interior. A final shower of fresh parsley and a squeeze of lemon brightens everything beautifully.

Growing up in Morocco, we’d serve seafood tagine with a side of warm khobz bread and a simple salad of tomatoes and cucumbers. Now in my NYC kitchen, I pair this casserole with a crisp arugula salad dressed with lemon vinaigrette and maybe a glass of chilled Sauvignon Blanc. The acidity cuts through the richness of the cream and cheese, while the herbs in the salad echo the parsley on top. If you’re feeling indulgent, serve it with garlic butter rice or roasted asparagus spears.

For dinner parties, I set out small ramekins of extra lemon wedges and a sprinkle of red pepper flakes for those who want a touch more heat. The casserole also reheats beautifully for leftovers, which is rare for seafood dishes. My husband and I often fight over the last spoonful — it’s that good.

Make-Ahead, Storage & Reheating

As a busy NYC food blogger, I’m a huge fan of make-ahead meals. This Crab and Shrimp Casserole is perfect for prepping in advance. You can assemble the entire dish (without the breadcrumb topping) up to 24 hours ahead, cover it tightly, and refrigerate. When you’re ready to bake, add the breadcrumbs and cheese, then bake as directed, adding about 5–8 extra minutes since you’re starting from cold. Leftovers also keep beautifully, making this a recipe you’ll want to double.

A note on reheating seafood: gentle heat is your friend. If you microwave individual portions, do it in 30-second bursts at 50% power to avoid rubbery shrimp. For larger portions, the oven method is best. I actually love leftovers the next day — the flavors meld together even more beautifully overnight. The sauce thickens slightly and every bite is infused with that Moroccan spice warmth.

Variations & Easy Swaps

Spicy Harissa Swirl

For a bolder North African kick, swirl 1–2 tablespoons of harissa paste into the béchamel before adding the seafood. Harissa — a smoky, spicy chili paste from Tunisia and Morocco — adds incredible depth and a beautiful red hue. I buy rose harissa from the NYC spice shop Sahadi’s, but you can find it at Whole Foods or online. Start with 1 tablespoon and taste; the heat level varies by brand. This variation pairs beautifully with a side of couscous and is a real showstopper for dinner parties.

Gluten-Free Crab and Shrimp Casserole

To make this casserole gluten-free, swap the all-purpose flour for a 1:1 gluten-free flour blend (I like Bob’s Red Mill) or use a cornstarch slurry (2 tablespoons cornstarch whisked into 1/4 cup cold milk, then stirred into the sauce at the end). The texture will be slightly less thick than with wheat flour, but still lusciously creamy. For the topping, use gluten-free panko or crushed gluten-free crackers. I’ve tested this version for my gluten-sensitive friends, and it’s always a hit — no one misses the gluten.

Extra Veggie Crab and Shrimp Casserole

When I’m at the Union Square Greenmarket in the summer, I love adding seasonal vegetables to this casserole. Sautéed spinach, chopped artichoke hearts, or sliced mushrooms all work beautifully. Simply cook the veggies along with the onion in Step 2, then proceed with the recipe. Zucchini and yellow squash (diced and sautéed) are also lovely. This stretches the dish to feed a larger crowd and adds wonderful texture and color. A handful of fresh dill or tarragon stirred in at the end takes it over the top.

Share Your Version!

I hope this Crab and Shrimp Casserole with its cozy Moroccan-inspired warmth brings as much joy to your table as it does to mine. It’s one of those recipes that feels both special and achievable — perfect for a Sunday dinner, a holiday gathering, or just because you deserve something delicious. If you make it, I’d love to hear how it turned out. Did you add the harissa swirl? Serve it with couscous? Use a different cheese? Every variation tells a story, and I love reading about your kitchen adventures.

Leave a star rating and a comment below — your feedback helps other home cooks find and try this recipe. And if you share a photo on Instagram or Pinterest, please tag @cosycookery so I can see your beautiful creation. I personally read every comment and love answering your questions. From my NYC kitchen to yours — I hope this recipe brings as much warmth to your table as it does to mine. — Olga 🧡