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 Spinach Casserole?

You need 7 ingredients. The key ingredients include: 2 boxes frozen chopped spinach, thawed, 1 can cream of mushroom soup, 1 can corn, drained, 4 to 5 shiitake mushrooms, sliced, and more.

Is Spinach Casserole suitable as vegetarian?

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

How do I store leftover Spinach Casserole?

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

Spinach Casserole Recipe

Name: Spinach Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 2 boxes frozen chopped spinach, thawed; 1 can cream of mushroom soup; 1 can corn, drained; 4 to 5 shiitake mushrooms, sliced; 6 to 8 fresh mushrooms, chopped (I usually use the entire tub of mushrooms); 1/2 c. mayonnaise; 2 egg whites

Try this homemade Spinach Casserole recipe the whole family will love. Made with cream of mushroom soup, corn, shiitake mushrooms and mushrooms. Easy st…

This Spinach Casserole relies on simple, everyday ingredients such as cream of mushroom soup, corn, drained, mayonnaise and egg whites. It comes together quickly and makes 4 servings, at about 450 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

Servings: persons

2 boxes frozen chopped spinach, thawed
1 can cream of mushroom soup
1 can corn, drained
4 to 5 shiitake mushrooms, sliced
6 to 8 fresh mushrooms, chopped (I usually use the entire tub of mushrooms)
1/2 c. mayonnaise
2 egg whites

Frequently Asked Questions

Quick Info

Servings
4 servings
Calories
450 kcal
Category
Vegetarian

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