Cheesy Spinach Casserole

Prep: 15 min Cook: 30 min Serves: 6 Cuisine: American

Creamy, cheesy spinach casserole with a savory onion flavor, perfect as a comforting side dish or appetizer for family dinners or gatherings.

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Ingredients

  • 2 (10 oz.) packages frozen chopped spinach
  • 1 (8 oz.) carton sour cream
  • 2 Tbsp. dry onion soup mix
  • 1 cup (4 oz.) shredded medium Cheddar cheese

Instructions

  1. Cook spinach according to package directions, omitting salt; drain well.
  2. Combine cooked spinach, sour cream, and onion soup mix in a bowl.
  3. Mix well until ingredients are evenly incorporated.
  4. Spoon the mixture into a lightly greased 1-quart casserole dish.
  5. Sprinkle shredded Cheddar cheese over the spinach mixture.
  6. Cover the casserole and chill overnight in the refrigerator.
  7. Remove from refrigerator 30 minutes before baking.
  8. Bake at 350°F for 30 minutes until heated through and bubbly.

Tips & Substitutions

For added flavor, consider mixing in some garlic powder or a pinch of nutmeg with the spinach mixture. If you're out of sour cream, Greek yogurt can be a great substitute. You can also experiment with different cheeses like mozzarella or pepper jack for a unique twist. For a heartier dish, try adding some cooked chicken or crumbled bacon.

Serving Suggestions

This Cheesy Spinach Casserole pairs beautifully with a fresh garden salad or roasted vegetables for a complete meal. It's also an excellent side dish for grilled meats or holiday feasts. Consider serving it alongside American recipes like barbecued chicken or beef for a comforting dinner experience.

Storage & Reheating

Store any leftover casserole in an airtight container in the refrigerator for up to 3 days. To reheat, cover with foil and bake at 350°F for about 15-20 minutes, or until heated through. Alternatively, you can microwave individual portions on a microwave-safe plate for 1-2 minutes until warm.

Nutrition & Diet Analysis (per serving)

Each serving of Cheesy Spinach Casserole contains roughly 241 calories, with 12g protein, 18g carbohydrates, and 13g fat. It is an excellent source of calcium (30% of the Daily Value), protein (24% of the Daily Value), and vitamin A (24% of the Daily Value). Note that it is relatively high in sodium, at 536mg per serving (23% of the Daily Value).

241 kcal 12% DV
Protein Fat Carbs

Macronutrients

Protein 12.1g 24% DV
Total Fat 13.5g 17% DV
Carbs 18.2g 7% DV
Fiber 0.3g 1% DV
Sugar 0.6g 1% DV

Electrolytes

Sodium 535.8mg 23% DV
Potassium 181.7mg 4% DV
Cholesterol 48.3mg 16% DV

Vitamins & Minerals

Vitamin A 219mcg 24% DV
Vitamin C 0.9mg 1% DV
Vitamin D 0.2mcg 1% DV
Calcium 396.3mg 30% DV
Iron 0.2mg 1% DV
Diet fit Low-carb Under 400 cal
Contains Milk

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 fresh spinach instead of frozen?

Yes, you can use fresh spinach! You will need about 1 pound of fresh spinach to equal the 20 oz. of frozen spinach. Sauté the fresh spinach in a little olive oil until wilted before mixing it with the other ingredients.

Can I make this casserole ahead of time?

Absolutely! This casserole is perfect for making ahead. Prepare it up to the point of baking, cover it tightly, and refrigerate overnight. When you're ready to bake, remove it from the fridge 30 minutes prior to allow it to come to room temperature.

Is this casserole suitable for vegetarians?

Yes, this Cheesy Spinach Casserole is a vegetarian dish, making it a great option for those following vegetarian recipes. Just ensure that the cheese and soup mix you use don't contain any animal-derived ingredients.

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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