How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Overnight Crab Casserole?

You need 11 ingredients. The key ingredients include: 1 (7 1/2 oz.) pkg. frozen crab or crab substitute, 1 c. uncooked shell macaroni, 4 oz. shredded Cheddar cheese, 2 hard-boiled eggs, coarsely chopped, and more.

Is Overnight Crab Casserole suitable as seafood?

Yes, Overnight Crab Casserole falls under the Seafood category and is a great choice for this type of meal.

How do I store leftover Overnight Crab Casserole?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Overnight Crab Casserole Recipe

Name: Overnight Crab Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 (7 1/2 oz.) pkg. frozen crab or crab substitute; 1 c. uncooked shell macaroni; 4 oz. shredded Cheddar cheese; 2 hard-boiled eggs, coarsely chopped; 1 (10 3/4 oz.) can cream of mushroom soup; 1 can milk; 1 Tbsp. chopped chives; paprika; black or green chopped or sliced olives; 1 jar chopped pimentos; 1 jar mushrooms

Try this homemade Overnight Crab Casserole recipe the whole family will love. Made with frozen crab, shell macaroni, Cheddar cheese and eggs. Easy step-…

This Overnight Crab Casserole relies on simple, everyday ingredients such as uncooked shell macaroni, shredded cheddar cheese, milk and chopped chives. It comes together quickly and makes 4 servings, at about 257 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 Seafood

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Coconut cream is a reliable plant-based alternative to dairy cream.

No specific allergen information. Please check the ingredient list for possible allergens.

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Overnight Crab Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

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Frequently Asked Questions