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 Grandma A's Spinach Casserole?

You need 15 ingredients. The key ingredients include: 1 (10 ounce) box frozen chopped spinach, 1 (10 1/2 ounce) can cream of mushroom soup, 2 tablespoons melted margarine, ½ cup grated sharp cheddar cheese, and more.

Is Grandma A's Spinach Casserole suitable as vegetarian?

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

How do I store leftover Grandma A's Spinach Casserole?

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

Grandma A's Spinach Casserole Recipe

Name: Grandma A's Spinach Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 (10 ounce) box frozen chopped spinach; 1 (10 1/2 ounce) can cream of mushroom soup; 2 tablespoons melted margarine; ½ cup grated sharp cheddar cheese; 1 small onion, minced; 1 egg, beaten; 1 ½ cups prepared stuffing; 2 tablespoons finely chopped onions; ¼ cup chopped celery; 2 tablespoons margarine; 1 ½ cups bread cubes; ⅓ teaspoon salt; ¼ teaspoon sage; ¼ teaspoon thyme; 1 dash pepper

Try this homemade Grandma A's Spinach Casserole recipe the whole family will love. Made with spinach, cream of mushroom soup, margarine and cheddar chee…

This Grandma A's Spinach Casserole relies on simple, everyday ingredients such as melted margarine, grated sharp cheddar cheese, small onion, minced and egg, beaten. It comes together quickly and makes 4 servings, at about 123 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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Grandma A's Spinach Casserole

Tips for the best results

Variations & substitutions

My Personal Notes

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Frequently Asked Questions