Shrimp and Crabmeat Seafood Casserole

Seafood casserole with golden brown cheese topping

The Spruce Eats / Julia Hartbeck

Prep: 15 mins
Cook: 21 mins
Total: 36 mins
Servings: 4 servings
Nutrition Facts (per serving)
492 Calories
22g Fat
18g Carbs
53g Protein
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Nutrition Facts
Servings: 4
Amount per serving
Calories 492
% Daily Value*
Total Fat 22g 28%
Saturated Fat 12g 61%
Cholesterol 370mg 123%
Sodium 1544mg 67%
Total Carbohydrate 18g 7%
Dietary Fiber 1g 3%
Total Sugars 7g
Protein 53g
Vitamin C 5mg 23%
Calcium 364mg 28%
Iron 2mg 13%
Potassium 693mg 15%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
(Nutrition information is calculated using an ingredient database and should be considered an estimate.)

A creamy, quick, and easy seafood casserole is the perfect weeknight meal when you encounter good prices in the fish market. Just because it's made out of seafood doesn't mean it can't be budget-friendly. Shrimp, lobster, and crabmeat make the base of this delicious classic, but other sea offerings have a place in it if you want to swap out lobster for scallop pieces—better priced than whole scallops—or for firm white fish like haddock or halibut. Pick, choose, and make your own version with what you can get at your local market.

Seafood is a great source of protein and healthy Omega-3 fatty acids. Just think, one 4-ounce serving of raw shrimp has 20 grams of protein and 2.7 milligrams of iron, equivalent to almost 50 percent of the recommended daily intake of protein for adults, and 15 percent of the recommended daily intake of iron. Our casserole is a combination of flavor and nutrition, and with our recipe, you can feed and satisfy four hungry guests with a filling seafood meal, flavored with wine, herbs, and a touch of tangy parmesan cheese. Serve with a simple pasta dish and a fresh salad.


  • 5 tablespoons unsalted butter, divided

  • 4 ounces mushrooms, thinly sliced

  • 12 to 16 ounces shrimp, cooked and cut into small pieces

  • 8 ounces cooked lobster meat

  • 4 ounces cooked crabmeat

  • 1/4 cup all-purpose flour

  • 2 cups milk

  • Kosher salt, to taste

  • Freshly ground black pepper, to taste

  • 1/4 teaspoon paprika

  • 2 teaspoons thinly sliced chives

  • 2 teaspoons finely chopped parsley

  • 2 tablespoons dry white wine (or sherry)

  • 2 to 4 tablespoons grated parmesan cheese

Steps to Make It

  1. Gather the ingredients.

    Ingredients for seafood casserole recipe gathered
    The Spruce Eats / Julia Hartbeck
  2. Heat the oven to 350 F. Melt 1 tablespoon of butter in a medium saucepan or sauté pan over medium heat. Add the sliced mushrooms and cook, stirring, until they are tender.

    Mushrooms frying in butter and being stirred with a wooden spoon
    The Spruce Eats / Julia Hartbeck
  3. Use a small piece of the reserved butter to grease a 1 1/2-quart casserole, then combine in it the shrimp, lobster, and crabmeat. Add the cooked mushrooms on top.

    Shrimp, lobster, and crabmeat topped with mushrooms in a ceramic casserole dish
    The Spruce Eats / Julia Hartbeck
  4. Add the remaining butter to a saucepan and place it over medium-low heat; stir in flour until smooth and bubbly. Continue cooking, stirring, for 2 minutes.

    Smooth melted butter and flour mixture being stirred with a wooden spoon in a frying pan
    The Spruce Eats / Julia Hartbeck
  5. Gradually add the milk, stirring constantly. Continue to cook and stir over low heat until the sauce is thickened and bubbly. Stir in the salt, pepper, paprika, chives, parsley, and wine.

    Thickened white sauce with dried herbs and seasonings in a frying pan
    The Spruce Eats / Julia Hartbeck
  6. Gently pour the sauce into the seafood mixture and mix well. Sprinkle with the parmesan cheese.

    Casserole ingredients covered with sauce and sprinkled with grated cheese
    The Spruce Eats / Julia Hartbeck
  7. Bake the casserole in the preheated oven for 20 minutes.

    Baked casserole with light golden melted cheese top
    The Spruce Eats / Julia Hartbeck
  8. Turn on the broiler for a minute to achieve a brown and attractive top.

    Broiled casserole with golden brown top
    The Spruce Eats / Julia Hartbeck
  9. Serve immediately and enjoy.

    Seafood casserole with golden brown cheese top being served with a spoon
    The Spruce Eats / Julia Hartbeck

Can I Freeze a Seafood Casserole?

You absolutely can. Simply assemble the casserole without adding the Parmesan cheese. Let cool off slightly and place in the fridge until totally cold. Cover tightly with plastic wrap and place in the freezer for up to three months.

For reheating the frozen casserole, let it sit at room temperature for 15 minutes while you preheat the oven to 375 F. Cover the casserole with aluminum foil and bake, covered, for 20 minutes. Take the foil off and bake for 15 minutes. Add the Parmesan cheese and bake for an additional 15 minutes.

If not freezing, simply place the leftovers in an airtight container and use them within two days.

Glass Bakeware Warning

Do not use glass bakeware when broiling or when a recipe calls for adding liquid to a hot pan, as glass may explode. Even if it states oven-safe or heat resistant, tempered glass products can, and do, break occasionally.

Article Sources
The Spruce Eats uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
  1. Shrimp, Raw. FoodData Central. United States Department of Agriculture.