Name: Shrimp and Crab Seafood Casserole Recipe
Prep time: 30 min
Cook time: 1 h 30 min
Total time: 2 h
Cuisine: American
Ingredients: 1 1/4 pounds large peeled and deveined uncooked shrimp (21-30 count, tails removed); 1 container (8-ounce) jumbo lump crab (drained, rinsed, and picked over for any shell fragments); 1 medium onion (finely chopped); 2 stalks celery (chopped); 1 medium red bell pepper (finely chopped); 1 can (5-ounce) whole water chestnuts (halved lengthwise and cut into 1/4-inch pieces); 1/4 cup chopped fresh parsley (divided); 1 1/2 cups white long-grain rice (preferably converted or parboiled rice); 1 cup half and half; 1/2 cup mayonnaise (preferably full-fat); 6 tablespoons butter (divided); 3 cups water; 1/4 cup tomato puree; 1 tablespoon lemon juice; 1 teaspoon paprika; 1/2 teaspoon cayenne pepper (or to taste); 1/4 teaspoon ground nutmeg; Salt and freshly ground black pepper (to taste); 1 1/2 cups coarse fresh breadcrumbs

I absolutely love sharing this Shrimp and Crab Seafood Casserole Recipe with friends and family because it perfectly combines the delicate sweetness of fresh seafood with comforting, creamy textures and a crispy topping. When I make this dish, I’m always excited to see how the layers of shrimp, crab, and flavorful rice come together in such a cozy, satisfying casserole that feels both special and homey. It’s the kind of recipe that turns any gathering into an occasion and any weeknight into a treat.

Why You'll Love This Shrimp and Crab Seafood Casserole Recipe

What truly makes this casserole stand out for me is its incredible flavor profile. The tender shrimp and succulent crab provide a wonderful seafood sweetness, while the rice mixture, enriched with half and half and mayonnaise, creates a creamy base with subtle tang and spice from the paprika, cayenne, and nutmeg. I love how the slight heat from the cayenne gently wakes up the palate without overpowering the dish. Plus, the fresh crunch of water chestnuts adds an unexpected texture that I find delightful. It’s a perfect balance of comfort food with a refined touch.

Another reason I keep coming back to this Shrimp and Crab Seafood Casserole Recipe is its straightforward preparation. While it may look impressive, the steps are simple and well-paced, making it manageable even on busier days. I especially appreciate how it can be assembled ahead of time and then popped in the oven when guests arrive. Whether I’m serving it for a family dinner, a casual party, or a holiday feast, this casserole always impresses without causing me stress in the kitchen. It’s become my go-to when I want a dish that feels indulgent and flavorful but is totally doable.

Ingredients You'll Need

The image shows several small clear glass bowls arranged neatly on a white marbled surface, each holding a different cooking ingredient. Starting from the top left, there is a bowl with pale yellow butter cubes, next to it a bowl with finely chopped white onion, and to the right, a bowl filled with uncooked white rice. Below the butter is a bowl of light green diced celery, beside it a bowl with bright red diced bell pepper, and to the right is a clear glass measuring cup filled with white half & half cream. Beneath these is a small bowl with pale yellow lemon juice, a bowl filled with pinkish-white shrimp, and next to it a bowl with creamy white mayonnaise. Below the shrimp is a bowl of white water chestnuts, and next to it a bowl with white crab meat. To the right of the mayonnaise and crab are small bowls with reddish-orange cayenne powder, brown nutmeg, and deep red paprika, while a tiny bowl below holds a mix of pink and black salt and pepper. At the bottom are bowls with chopped fresh green parsley and light beige breadcrumbs. All items are clearly shown with their textures and colors visible. Photo taken with an iphone --ar 4:5 --v 7

Each ingredient in this recipe plays a crucial role in bringing out the overall harmony of flavors and textures. From the large shrimp and jumbo lump crab providing rich seafood notes, to the fresh vegetables and seasonings adding layers of taste and color, every element is simple yet essential for that perfect casserole experience.

Shrimp (1 ¼ pounds): Large peeled and deveined shrimp deliver the main seafood flavor and juicy texture.
Butter (6 tablespoons): Used both for cooking and topping, it adds richness and helps create a luscious mouthfeel.
Onion (1 medium): Finely chopped to give a mild sweetness and aromatic depth.
Celery (2 stalks): Chopped for a subtle crunch and fresh herbaceous notes.
Red bell pepper (1 medium): Adds color and a sweet, slightly fruity flavor.
Water (3 cups): For cooking the rice properly tender while allowing flavors to mesh.
Long-grain white rice (1 ½ cups): A sturdy rice that absorbs flavors well and keeps the casserole light.
Water chestnuts (5-ounce can): Halved and finely cut for surprising crunch and contrast.
Half and half (1 cup): Creamy liquid to enrich the rice mixture and bind ingredients smoothly.
Mayonnaise (½ cup): Full-fat preferred for tangy creaminess and moisture.
Tomato puree (¼ cup): Gives the casserole a subtle tomato depth and beautiful color.
Lemon juice (1 tablespoon): Brightens the dish and balances the richness perfectly.
Paprika (1 teaspoon): Adds smoky warmth and vibrant color.
Cayenne pepper (½ teaspoon): For a gentle kick; adjust based on your heat preference.
Nutmeg (¼ teaspoon): A small pinch to provide subtle warmth and complexity.
Fresh parsley (¼ cup): Adds freshness and lovely green color throughout the casserole.
Jumbo lump crab (8-ounce container): The star seafood element with sweet, tender chunks.
Coarse fresh breadcrumbs (1 ½ cups): For a crunchy, buttery topping that seals all the flavors.

Directions

Step 1: Preheat your oven to 375°F (190°C) and prepare a 13 x 9-inch or similar-sized baking dish by buttering it generously, using some oil, or coating it with non-stick cooking spray. I like to use butter here for extra flavor.

Step 2: Bring a saucepan filled with water to a boil. Add a good amount of salt and freshly ground black pepper for seasoning. Drop the shrimp in and cook them very briefly—between 30 seconds and a minute—just until they turn pink. Be very careful not to overcook. Once done, drain and immediately rinse the shrimp under cold running water to stop the cooking process and keep them tender.

Step 3: In a large, deep saucepan, melt 4 tablespoons of butter over medium heat. Add the finely chopped onion, celery, and red bell pepper. Reduce the heat to medium-low and cook for 5 to 6 minutes, stirring gently until the vegetables soften but do not brown—this gentle cooking releases wonderful sweetness and aroma.

Step 4: Stir in 3 cups of water, along with 1 teaspoon of salt and a pinch or two of black pepper. Bring this mixture to a boil, then add the rice. Return to a boil, cover, and immediately reduce the heat to low. Let the rice cook covered for 10 to 12 minutes until tender. Turn off the heat but keep it covered; allow the rice to steam and finish cooking for another 10 minutes.

Step 5: Transfer the rice and vegetable mixture to a large bowl. Let it cool for 5 to 6 minutes, until it’s warm but no longer steaming. This cooling step helps when mixing in the delicate seafood and creamy ingredients later.

Step 6: Into the warm rice mixture, fold gently the halved and chopped water chestnuts, half and half, mayonnaise, tomato puree, lemon juice, paprika, cayenne pepper, nutmeg, and 3 tablespoons of fresh chopped parsley. Taste your mixture and adjust seasoning with more salt or pepper if needed.

Step 7: To assemble the casserole, spoon one-third of the rice mixture into your prepared baking dish. Layer half the cooked shrimp over this rice and gently press them in to embed them. Next, scatter half the jumbo lump crab evenly over the shrimp. Cover with another third of the rice mixture, then add the remaining shrimp and crab in the same way, pressing down gently. Top with the remaining rice mixture to finish the layers.

Step 8: In a small bowl, mix the coarse breadcrumbs with the remaining 2 tablespoons of softened butter until combined well. Sprinkle this buttery breadcrumb topping evenly over the layered casserole.

Step 9: Cover the dish loosely with aluminum foil to prevent the topping from burning while baking.

Step 10: Bake in the preheated oven for 30 to 40 minutes, or until the casserole is heated through and an internal temperature of 165°F (74°C) is reached in the center. During the last 10 minutes, remove the foil to allow the breadcrumb topping to become golden and crisp. Serve the casserole immediately for warm, comforting goodness.

Servings and Timing

This Shrimp and Crab Seafood Casserole Recipe yields about 8 generous servings, which makes it perfect for larger family dinners or gatherings. The prep time comes in around 30 minutes, mostly for chopping and initial cooking steps. The rice cooking and baking together take approximately 1 hour and 30 minutes, including resting time for the rice after cooking. Overall, you’ll spend nearly 2 hours from start to finish, but the steps are mostly hands-off once the casserole is baking, which gives you some breathing room to prepare sides or relax a bit.

How to Serve This Shrimp and Crab Seafood Casserole Recipe

A white oval dish filled with a baked shrimp and rice casserole, showing two main layers; the bottom layer is a creamy mix of cooked rice, shrimp, and small bits of red bell pepper, with the shrimp visible on the right side where a spoon scoops some out, and the top layer is a thick, golden-brown toasted breadcrumb crust sprinkled with green chopped herbs, giving a crunchy texture. The dish sits on a white marbled surface with a silver spoon resting in the dish, partially inside the casserole. The crumbs on top look uneven and crunchy, with some darker toasted spots. photo taken with an iphone --ar 4:5 --v 7

I love serving this casserole piping hot straight from the oven to fully enjoy the creamy layers and crispy topping contrast. It pairs beautifully with simple sides that don’t compete with the seafood flavors—think a crisp green salad with a lemon vinaigrette or steamed fresh asparagus for a vibrant touch. Roasted vegetables or garlic bread also work wonderfully to soak up any extra creamy sauce left on the plate.

When it comes to garnishing and presentation, a sprinkle of fresh parsley or chives right before serving adds a bright color pop and fresh aroma that excites the senses. I sometimes add a few lemon wedges alongside the casserole so guests can squeeze extra brightness onto their portions, which really complements the seafood.

In terms of beverages, this casserole shines with a chilled glass of crisp white wine like Sauvignon Blanc or Pinot Grigio. If you prefer cocktails, a light, citrusy gin and tonic makes a refreshing companion. For non-alcoholic options, sparkling water with a hint of lemon or a cucumber mint cooler keeps things bright and balanced. This dish truly works for many occasions—from cozy family dinners to festive parties, and it’s most enjoyable served warm or hot for that perfect seafood comfort.

Variations

I’m always excited to mix things up with this Shrimp and Crab Seafood Casserole Recipe depending on what’s in my kitchen or dietary needs. For example, if jumbo lump crab isn’t available, I substitute with fresh lump crab meat or even a nice quality imitation crab for budget-friendly versions without sacrificing flavor too much. You can also swap the shrimp for scallops or chunks of firm white fish to keep it interesting.

If you’re looking for gluten-free options, simply swap the breadcrumbs for gluten-free breadcrumbs or crushed nuts for a topping with crunch. For those who need dairy-free, I’ve had success replacing the butter with olive oil or a non-dairy butter and using full-fat coconut milk instead of half and half and mayonnaise. The texture is slightly different but still deliciously rich and creamy!

To vary the flavor profile, I like adding a squeeze of fresh orange juice in place of lemon juice for a sweeter brightness or sprinkle in some smoked paprika instead of regular paprika for a deeper smokiness. Also, rather than baking, occasionally I prepare this casserole in a slow cooker for a softer texture and super tender seafood - just layering and cooking on low for 2-3 hours.

Storage and Reheating

Storing Leftovers

After enjoying this Shrimp and Crab Seafood Casserole Recipe, I store any leftovers in an airtight container to keep the flavors fresh and the creamy texture intact. I recommend using glass containers with tight-fitting lids for easy reheating and to prevent any odors from mingling in the fridge. Properly stored, the casserole will keep well in the refrigerator for up to 3 days. I find that leftover portions taste even better the next day once the flavors have had time to meld further.

Freezing

This casserole freezes fairly well if you want to prepare it ahead of time. To freeze, wrap the assembled (but unbaked) casserole tightly with plastic wrap and then with aluminum foil to avoid freezer burn. Label it with the date and it will keep best for up to 2 months. When ready to enjoy, thaw overnight in the refrigerator before baking as usual. However, keep in mind that the breadcrumb topping may not stay as crisp after freezing and reheating, but the flavors and textures inside remain satisfying.

Reheating

When reheating, I recommend warming the casserole in the oven at 325°F (160°C) until heated through, about 20 to 25 minutes depending on portion size. Cover the dish loosely with foil to prevent the topping from over-browning and remove it near the end if you want to revive some crispness. Avoid microwaving if possible, as it can make the casserole soggy and unevenly heated. Adding a sprinkle of fresh parsley after reheating refreshes the dish beautifully.

FAQs

Can I use frozen shrimp and crab for this casserole?

Yes, you can use frozen shrimp and crab, but make sure to thaw them thoroughly in the refrigerator overnight and pat them dry to avoid excess moisture in the casserole. Using fresh seafood provides the best flavor and texture, but frozen works well when handled properly.

Is this casserole suitable for meal prep and freezing?

Absolutely. You can assemble the casserole ahead of time and freeze it unbaked. When ready to serve, just thaw overnight in the fridge and bake as directed. This makes it an excellent option for easy weeknight dinners or entertaining with advance prep.

Can I make this recipe dairy-free?

Yes, by substituting the butter for olive oil or a dairy-free margarine and replacing half and half and mayonnaise with coconut milk-based versions or other plant-based alternatives, you can make a tasty dairy-free casserole. It might taste slightly different but still creamy and delicious.

What kind of rice works best in this recipe?

I recommend using long-grain white rice, specifically converted or parboiled rice, since it remains fluffy and doesn’t get overly sticky. This ensures your casserole has the perfect texture and holds the layers together nicely.

Can I add other seafood such as scallops or lobster?

Definitely! This recipe is versatile, and adding scallops or lobster chunks can elevate the dish even more. Just be mindful of cooking times, as scallops cook quickly and lobster should be added toward the end to avoid overcooking.

Conclusion

I truly hope you give this Shrimp and Crab Seafood Casserole Recipe a try soon. It’s one of those dishes that feels like a warm hug on a plate, packed with flavors and textures that delight every bite. Whether you’re feeding a crowd or simply treating yourself, this casserole brings together the best of seafood comfort food with ease and elegance. I can’t wait for you to enjoy it as much as I do!