Golden and cheesy on top, creamy and savory inside, this Easy Spinach Casserole is the comfort dish that gets everyone asking for seconds. With layers of hearty spinach, rich creaminess, and the perfect cheesy crust, it’s an effortless yet satisfying addition to any table. Whether you’re looking to elevate a weeknight dinner or need a reliable holiday side dish, this casserole delivers flavor and ease in every bite.

It’s one of those dishes that feels indulgent but sneaks in the greens. The best part? It uses everyday ingredients and requires minimal prep, making it a favorite for busy home cooks who still crave something wholesome and flavorful.

Why You’ll Love This Easy Spinach Casserole

Flavor-packed: Savory, cheesy, and comforting with every bite.
Crowd-pleaser: Perfect for holidays, potlucks, and weeknight dinners alike.
Minimal prep: Uses frozen spinach and pantry staples for convenience.
Versatile: Serve as a side or even a vegetarian main dish.
Make-ahead friendly: Easy to prepare ahead and reheat beautifully.

Preparation Phase & Tools to Use

To make the most of this dish, having the right tools can streamline your process and improve results:

Large Mixing Bowl: Essential for combining the creamy base and spinach evenly.
Whisk or Hand Mixer: Ensures smooth blending of eggs, sour cream, and seasonings.
Fine Mesh Sieve or Colander: Crucial for draining excess moisture from the thawed spinach, preventing a watery bake.
Casserole Dish (8×8 or similar): For optimal thickness and even baking.
Oven & Timer: Reliable temperature control ensures the top gets golden without overcooking the interior.

Ingredients for the Easy Spinach Casserole

Frozen Chopped Spinach: Forms the bulk of the dish with earthy, hearty flavor. Be sure to thaw and squeeze out moisture.
Eggs: Act as a binder and give structure.
Sour Cream: Adds tangy creaminess.
Shredded Cheese (Cheddar or Mozzarella): Brings richness and a golden crust.
Onion (Optional): Adds depth and savoriness.
Garlic Powder & Salt: Essential seasonings to enhance the spinach.

How To Make the Easy Spinach Casserole

Step 1: Prep the Spinach

Thaw the frozen chopped spinach and squeeze it dry using a sieve or a clean towel to remove all excess liquid.

Step 2: Mix the Base

In a large bowl, whisk together the eggs, sour cream, garlic powder, and salt until smooth.

Step 3: Combine Ingredients

Fold in the drained spinach and shredded cheese. If using onion, mix that in as well.

Step 4: Assemble in Casserole Dish

Transfer the mixture into a greased 8×8-inch casserole dish and spread evenly.

Step 5: Bake Until Golden

Bake at 350°F (175°C) for 35-40 minutes, or until the top is golden brown and the center is set.

Serving and Storing the Spinach Casserole

This casserole is best served warm, straight from the oven. It pairs beautifully with grilled chicken, roasted potatoes, or even a hearty soup. To store, cover leftovers and refrigerate for up to 4 days. Reheat in the oven for best texture or microwave in short intervals.

Freezing? Absolutely! Let it cool completely, slice into portions, and freeze in airtight containers. Thaw in the fridge overnight before reheating.

Frequently Asked Questions

Can I use fresh spinach instead of frozen?

Yes! Just cook down about 1.5 pounds of fresh spinach until wilted, then squeeze out the moisture.

What cheese works best?

Cheddar gives great flavor and melt, but you can also use mozzarella for mildness or a blend for extra depth.

Can I make it ahead?

Definitely. Assemble everything, cover, and refrigerate. Bake it fresh when ready.

Is this casserole gluten-free?

Yes, it contains no flour or breadcrumbs. Always check labels on cheese and seasonings to be sure.

Can I add protein?

Yes! Crumbled bacon, diced ham, or cooked ground turkey make excellent additions.

Want More Casserole Ideas?

If you love this Easy Spinach Casserole, you might also enjoy these hearty favorites:

French Onion Ground Beef and Rice Casserole — rich and savory with cheesy comfort.
Million Dollar Ravioli Casserole — creamy, layered, and indulgent.
Cheesy Rotel Ranch Queso — a spicy, melty hit.
Garlic Butter Beef Cheesy Bowtie Pasta — bold flavors in every bite.
Easy Baked Potato Chicken and Broccoli Casserole — filling and veggie-packed.

Save This Pin For Later

📌 Save this recipe to your Pinterest casserole board so you can come back to it any time: Kitchen By Kate on Pinterest

And let me know in the comments how yours turned out. Did you add bacon or keep it vegetarian? Did you try a different cheese?

I love hearing how others make these recipes their own. Questions are welcome too—let’s help each other bake smarter.

Easy Spinach Casserole

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Author: Kate Walton
Total Time: 45–50 minutes
Yield: 6 servings

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Description

This Easy Spinach Casserole recipe combines frozen spinach, creamy sour cream, and melted cheese into a comforting, crowd-pleasing bake. It’s the perfect cheesy spinach side dish for holidays, potlucks, or weeknight dinners. Gluten-free, make-ahead friendly, and easy to freeze!