Name: Cheesy Scalloped Crab and Shrimp Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: American
Ingredients: 8 oz cooked crab meat (lump or claw); 8 oz cooked shrimp, peeled and chopped; 3 tbsp butter; 3 tbsp all-purpose flour; 2 cups milk (whole or 2%); 1 cup heavy cream; 1 ½ cups shredded sharp cheddar cheese; 1 cup shredded mozzarella cheese; 1/2 cup grated Parmesan cheese; 1 small onion, finely chopped; 2 garlic cloves, minced; 1 tsp Dijon mustard (optional); 1/2 tsp Old Bay seasoning or paprika; Salt and pepper, to taste; 1 cup sliced mushrooms (optional); 1/2 cup breadcrumbs (for topping); 2 tbsp fresh parsley, chopped (for garnish)

Description

This cheesy scalloped crab and shrimp casserole is a creamy, comforting oven-baked seafood dish with melty cheese, tender crab and shrimp, and a crispy breadcrumb topping. Perfect for holidays, gatherings, or cozy dinners.

Ingredients

8 oz cooked crab meat (lump or claw)

8 oz cooked shrimp, peeled and chopped

3 tbsp butter

3 tbsp all-purpose flour

2 cups milk (whole or 2%)

1 cup heavy cream

1 ½ cups shredded sharp cheddar cheese

1 cup shredded mozzarella cheese

1/2 cup grated Parmesan cheese

1 small onion, finely chopped

2 garlic cloves, minced

1 tsp Dijon mustard (optional)

1/2 tsp Old Bay seasoning or paprika

Salt and pepper, to taste

1 cup sliced mushrooms (optional)

1/2 cup breadcrumbs (for topping)

2 tbsp fresh parsley, chopped (for garnish)

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Instructions

Preheat oven to 350°F (175°C) and grease a 9×13-inch baking dish.
In a saucepan, melt butter over medium heat and sauté onions and garlic until soft, about 3 minutes.
Stir in flour to form a roux and cook for 1–2 minutes.
Gradually whisk in milk and cream, simmering until the sauce thickens.
Remove from heat and stir in Dijon mustard (if using), Old Bay seasoning, salt, pepper, and most of the cheddar and mozzarella until smooth.
In a large bowl, gently fold in crab, shrimp, and optional mushrooms until coated with cheese sauce.
Transfer the mixture to the prepared baking dish. Sprinkle with remaining cheeses, Parmesan, and breadcrumbs.
Bake uncovered for 25–30 minutes until bubbly and golden on top.
Let rest for 5 minutes before garnishing with fresh parsley and serving warm.

Notes

Swap in half-and-half instead of heavy cream for a lighter version.

A splash of white wine adds depth to the sauce.

Use gluten-free flour and breadcrumbs for a gluten-free option.

Add frozen peas or diced bell peppers for extra color and texture.

Try topping with crushed buttery crackers for a Southern-style twist.

Prep Time: 15 minutes
Cook Time: 30 minutes
Category: Main Dish
Method: Baking
Cuisine: American

Nutrition

Serving Size: 1 serving
Calories: 450
Sugar: 4g
Sodium: 620mg
Fat: 30g
Saturated Fat: 16g
Unsaturated Fat: 12g
Trans Fat: 0g
Carbohydrates: 16g
Fiber: 1g
Protein: 28g
Cholesterol: 145mg