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 Gail'S Spinach Casserole?

You need 10 ingredients. The key ingredients include: 2 (10 oz.) boxes frozen, chopped spinach, 1 c. grated sharp Cheddar, 1 medium onion, chopped fine, 2 beaten eggs, and more.

Is Gail'S Spinach Casserole suitable as vegetarian?

Yes, Gail'S Spinach Casserole falls under the Vegetarian category and is a great choice for this type of meal.

How do I store leftover Gail'S Spinach Casserole?

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

Gail'S Spinach Casserole Recipe

Name: Gail'S Spinach Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 2 (10 oz.) boxes frozen, chopped spinach; 1 c. grated sharp Cheddar; 1 medium onion, chopped fine; 2 beaten eggs; 1/2 stick margarine; 1 can cream of mushroom soup; 3/4 c. mayonnaise; dash of garlic powder; salt and pepper; bread crumbs

Try this homemade Gail'S Spinach Casserole recipe the whole family will love. Made with spinach, Cheddar, onion and eggs. Easy step-by-step instructions…

This Gail'S Spinach Casserole relies on simple, everyday ingredients such as grated sharp cheddar, medium onion, chopped fine, beaten eggs and margarine. It comes together quickly and makes 4 servings, at about 660 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 Vegetarian

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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Gail'S Spinach Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

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Frequently Asked Questions