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Crab and Shrimp Casserole

A creamy, savory seafood casserole loaded with tender shrimp, sweet crab meat, and a cheesy, herb-infused sauce. Perfect for a comforting dinner or as a crowd-pleasing dish at gatherings.
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Ingredients Equipment Method Notes

Ingredients
  

  • Serves 6-8
  • Seafood:
  • 250 g 8 oz lump crab meat
  • 250 g 8 oz cooked shrimp, peeled and deveined
  • Base & Sauce:
  • 2 tbsp butter
  • 2 tbsp all-purpose flour
  • 250 ml 1 cup milk
  • 100 ml ½ cup heavy cream
  • 1 tsp Dijon mustard
  • ½ tsp garlic powder
  • ½ tsp onion powder
  • Salt and pepper to taste
  • Add-ins:
  • 1 small onion diced
  • 1 celery stalk finely chopped
  • 1 bell pepper red or green, chopped
  • 2 tbsp fresh parsley chopped
  • 100 g 1 cup shredded cheddar cheese
  • 100 g 1 cup breadcrumbs
  • 1 tbsp olive oil for topping

Equipment

  • 1 Large mixing bowl
  • 1 Medium saucepan
  • 1 Whisk
  • 1 9x13-inch baking dish
  • 1 Skillet
  • Oven

Method
 

  1. Preheat the oven to 180°C (350°F).
  2. In a skillet, sauté onion, celery, and bell pepper in 1 tbsp butter until soft (about 5–7 minutes). Set aside.
  3. In a saucepan, melt 2 tbsp butter over medium heat. Stir in the flour and whisk continuously for 1–2 minutes to form a roux.
  4. Slowly add milk and cream while whisking to avoid lumps. Cook until thickened (about 3–5 minutes).
  5. Stir in Dijon mustard, garlic powder, onion powder, salt, and pepper.
  6. Add the sautéed vegetables, shrimp, and crab meat to the sauce. Mix gently.
  7. Fold in half of the shredded cheddar and chopped parsley.
  8. Transfer the mixture to a greased 9x13 inch baking dish. Top with remaining cheddar.
  9. In a small bowl, combine breadcrumbs and olive oil, then sprinkle evenly over the casserole.
  10. Bake for 25–30 minutes until golden and bubbly.
  11. Let rest 5 minutes before serving.

Notes

Use fresh seafood if possible, but frozen (thawed) works too.
Add a dash of Old Bay seasoning for extra flavor.
Can be made ahead and refrigerated before baking—add 10 extra minutes to baking time if chilled.
Great served with rice, a green salad, or crusty bread.