1. Prep the Spinach
If using fresh spinach, wilt it in a large skillet with a splash of water (3-4 mins), then drain excess liquid.
If using frozen spinach, thaw, squeeze out all water, and chop.
2. Sauté Aromatics
In a skillet, melt butter over medium heat.
Add onion and garlic, cooking until soft (3-4 mins).
3. Make the Cheese Sauce
In a large bowl, mix cream cheese, sour cream, 1 ½ cups mozzarella, cheddar, Parmesan, salt, pepper, and nutmeg.
Stir in the sautéed onions/garlic and spinach until well combined.
4. Assemble & Bake
Spread mixture into a greased 9x13-inch baking dish.
Top with remaining ½ cup mozzarella.
(Optional) Mix breadcrumbs with melted butter and sprinkle on top.
Bake at 375°F (190°C) for 20-25 mins, until bubbly and golden.
5. Broil for Crispy Top (Optional)
For extra browning, broil for 1-2 mins (watch closely!).
Pro Tips for the Best Casserole
🔹 Squeeze ALL liquid from spinach – Prevents a soggy casserole.
🔹 Use full-fat dairy – For the creamiest texture.
🔹 Make it ahead – Assemble, refrigerate, and bake when needed (add 5-10 mins to baking time).
🔹 Freezer-friendly – Bake, cool, freeze, and reheat at 350°F (175°C) until warmed through.
Serving Suggestions & Variations
Add protein – Mix in cooked chicken, bacon, or sausage.
Keto-friendly – Swap breadcrumbs for crushed pork rinds or almond flour.
Extra veggies – Stir in sautéed mushrooms, artichokes, or sun-dried tomatoes.
Gluten-free – Use GF breadcrumbs or omit topping.
FAQs
Q: Can I use frozen spinach instead of fresh?
A: Yes! Just thaw and squeeze out all excess water to avoid a watery casserole.
Q: Can I make this without cream cheese?
A: You can substitute ricotta or Greek yogurt, but the texture will be less rich.
Q: How long does it last in the fridge?
A: Up to 4 days—reheat in the oven or microwave.
Final Thoughts
This Spinach and Cheese Casserole is the ultimate cheesy, comforting dish—whether you serve it as a side or main course, it’s guaranteed to be a hit. The creamy, garlicky, cheesy goodness makes it irresistible, and the easy prep means you’ll want to make it again and again!
Ready to dig in? This casserole is sure to become a family favorite!