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 Seafood Casserole?

You need 14 ingredients. The key ingredients include: 2 cans (4 oz.) mushrooms, drained, 2 c. finely diced celery, 1 large yellow onion, chopped fine, 1 green pepper, chopped fine, and more.

Is Seafood Casserole suitable as seafood?

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

How do I store leftover Seafood Casserole?

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

Seafood Casserole Recipe

Name: Seafood Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 2 cans (4 oz.) mushrooms, drained; 2 c. finely diced celery; 1 large yellow onion, chopped fine; 1 green pepper, chopped fine; 4 Tbsp. butter or oleo, divided; 1 jar (7 oz.) chopped pimento; 2 cans (10 1/2 oz.) cream of mushroom soup, undiluted; 3 c. shrimp (fresh) cooked, (frozen) thawed or canned; 1 lb. fresh or 2 cans (7 1/2 oz.) crabmeat; 1 c. cooked white rice; 1 c. wild rice or 2 boxes (6 oz.) long grain and wild rice (without seasoning packet); 1/2 c. milk; 2 c. well seasoned medium white sauce; 1 c. blanched whole almonds

Try this homemade Seafood Casserole recipe the whole family will love. Made with mushrooms, celery, yellow onion and green pepper. Easy step-by-step ins…

This Seafood Casserole relies on simple, everyday ingredients such as (4 oz.) mushrooms, drained, finely diced celery, green pepper, chopped fine and butter or oleo, divided. It comes together quickly and makes 4 servings, at about 1201 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

1201

kcal

Calories

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

Use a neutral oil or a plant-based spread in place of butter for a dairy-free version.
Leave out the nuts to make it nut-free, or swap in seeds for a similar crunch.
Coconut cream is a reliable plant-based alternative to dairy cream.

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

My Personal Notes

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Seafood Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

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