Overnight Crab Casserole

Prep: 480 min Cook: 60 min Serves: 6 Cuisine: American

A comforting overnight casserole combining tender crab meat, creamy mushroom soup, and melted cheddar cheese, baked to perfection. This dish offers rich flavors with a seafood twist, perfect for family dinners or special occasions that call for hearty, satisfying comfort food.

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Ingredients

  • 8 oz. crab meat or imitation crab
  • 4 oz. grated Cheddar cheese
  • 2 hard-boiled eggs
  • 1 c. milk
  • 1 c. uncooked shell macaroni
  • 1 can (10 1/2 oz.) cream of mushroom soup
  • 1 Tbsp. chopped onion

Instructions

  1. Combine all ingredients in a deep casserole dish (1 quart size). Cover and refrigerate for at least 8 hours.
  2. Bake covered at 350°F (175°C) for 1 hour.
  3. Optional: sprinkle a little paprika on top before serving.

Tips & Substitutions

For a creamier texture, consider adding a dollop of sour cream or Greek yogurt to the mixture. If you prefer a different flavor profile, substitute the Cheddar cheese with Monterey Jack or a smoky Gouda. To enhance the dish, try adding a teaspoon of Old Bay seasoning or lemon zest for brightness, reminiscent of popular seafood recipes.

Serving Suggestions

Serve the casserole hot, garnished with a sprinkle of fresh parsley or paprika for color. It pairs wonderfully with a crisp green salad or steamed vegetables. For a complete meal, consider serving it alongside crusty bread or over a bed of rice to soak up the flavors.

Storage & Reheating

Store any leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, place in the oven at 350°F (175°C) for about 20 minutes covered with foil to prevent drying out, or microwave in short intervals until heated through.

Nutrition & Diet Analysis (per serving)

Each serving of Overnight Crab Casserole contains roughly 370 calories, with 9g protein, 49g carbohydrates, and 16g fat. It is a good source of calcium (19% of the Daily Value), protein (18% of the Daily Value), and vitamin A (11% of the Daily Value).

370 kcal 18% DV
Protein Fat Carbs

Macronutrients

Protein 9.1g 18% DV
Total Fat 15.9g 20% DV
Carbs 48.8g 18% DV
Fiber 1g 3% DV
Sugar 3.9g 8% DV

Electrolytes

Sodium 392.3mg 17% DV
Potassium 287.7mg 6% DV
Cholesterol 116.7mg 39% DV

Vitamins & Minerals

Vitamin A 94.5mcg 11% DV
Vitamin C 1.3mg 1% DV
Vitamin D 0.2mcg 1% DV
Calcium 249.4mg 19% DV
Iron 1.5mg 8% DV
Diet fit Under 400 cal
Contains Milk Egg Shellfish

Estimated from ingredients & per-serving nutrition — verify against package labels for allergies or strict diets.

* % Daily Values based on a 2,000 calorie diet (FDA 2020).

Frequently Asked Questions

Can I use frozen crab meat for this recipe?

Yes, you can use frozen crab meat. Just make sure to thaw it completely and drain any excess moisture before adding it to the casserole to prevent it from becoming watery.

Is it possible to make this casserole gluten-free?

Absolutely! Simply use gluten-free pasta instead of regular shell macaroni and ensure that your cream of mushroom soup is gluten-free or make your own using cornstarch as a thickener.

Can I prepare this dish without eggs?

Yes, you can omit the hard-boiled eggs if you prefer. To maintain a similar texture and binding, consider adding an extra 1/4 cup of milk or using a flaxseed meal substitute to help hold the casserole together.

Nutrition is estimated from USDA FoodData Central ingredient data and may vary with brand, portion and preparation — see our methodology. This information is for general educational purposes only and is not medical or dietary advice (disclaimer).

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