Baked Zucchini Spinach Casserole

Name: Baked Zucchini Spinach Casserole
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Yield: 4 servings
Ingredients: 2 medium zucchinis, sliced; 2 cups fresh spinach, chopped; 1 cup shredded mozzarella cheese; 1/2 cup crumbled feta cheese; 2 large eggs; 1/2 cup milk; 1/4 cup grated Parmesan cheese; 1 teaspoon garlic powder; Salt and pepper to taste; Olive oil for greasing

Highlighted under: Oven Food

I absolutely love making this Baked Zucchini Spinach Casserole, especially during the summer when zucchinis are at their peak freshness. The combination of tender zucchini, vibrant spinach, and a creamy cheese blend creates a deliciously comforting dish that's perfect as a side or a main course. I enjoy serving it warm, right out of the oven, as it fills the kitchen with a mouthwatering aroma that draws everyone to the table. It's a nutritious yet indulgent way to enjoy veggies, and I can never resist going back for seconds!

Created by

Zadie Whitmore

Last updated on 2026-01-15T18:47:35.558Z

When I first made this Baked Zucchini Spinach Casserole, I wanted to create a dish that was both delicious and packed with nutrients. I experimented with different cheeses and it turns out that a combination of mozzarella and feta brings out the best flavors, balancing creaminess with a hint of tang. The strategic layering of zucchini and spinach not only looks appealing but also ensures that every bite is loaded with flavor.

One of the tips I discovered was to squeeze excess moisture from the spinach before mixing—this way, the casserole doesn’t turn out watery. I let it soak up all the flavors as it bakes, resulting in a golden top that’s irresistible. Every forkful is a winner—and it’s so easy to make!

Why You'll Love This Recipe
A delightful blend of fresh vegetables with a cheesy crust
Comfort food that’s surprisingly healthy and satisfying
Easy to adapt with your favorite herbs and spices

Understanding the Ingredients

The combination of zucchini and spinach serves not only for flavor but also for texture. Zucchini, with its high water content, helps keep the casserole moist, while spinach adds a vibrant green color and essential nutrients. The use of mozzarella provides a stringy, melt-in-your-mouth quality, complemented by the tang of feta cheese. Each ingredient plays a role; for instance, the eggs act as a binder, creating a cohesive structure that allows the casserole to hold together when served. The milk also enriches the filling, enhancing the creamy texture.

To make this dish vegetarian, feel free to substitute the feta with a vegan cheese alternative. You can easily adapt the herbs and spices to suit your palate; for a Mediterranean twist, consider adding fresh basil or oregano. Additionally, if you're looking to lower the calories, you can replace whole milk with almond or oat milk, though it may alter the texture slightly. The goal is to maintain enough creaminess and flavor while making it lighter, ensuring that it remains satisfying.

Baking Tips for a Perfect Casserole

For an even bake, ensure that your oven is fully preheated to 375°F (190°C) before placing the casserole inside. If you find that the top browns too quickly, covering it with aluminum foil for the first 25 minutes can prevent burning while allowing the inside to cook through. You'll know it’s done when the edges are bubbling, and the center is set – a gentle shake of the baking dish can help determine this. The top should be golden and slightly crisp for a delightful contrast in textures.

If you enjoy a crispy topping, consider mixing breadcrumbs with a bit of olive oil and Parmesan to sprinkle on top before baking. This will create an additional crunch that contrasts beautifully with the creamy filling. Also, keep an eye on the bake time, as smaller or larger batches may change the cooking duration. If you're using larger zucchinis, ensure they’re sliced thinly to avoid excess moisture that could make the casserole soggy.

Ingredients

For the Casserole

2 medium zucchinis, sliced
2 cups fresh spinach, chopped
1 cup shredded mozzarella cheese
1/2 cup crumbled feta cheese
2 large eggs
1/2 cup milk
1/4 cup grated Parmesan cheese
1 teaspoon garlic powder
Salt and pepper to taste
Olive oil for greasing

Mix all the ingredients together and prepare for the oven!

Instructions

Preheat the Oven

Preheat your oven to 375°F (190°C) and grease a medium-sized baking dish with olive oil.

Prepare the Filling

In a large bowl, combine sliced zucchini, chopped spinach, mozzarella cheese, feta cheese, eggs, milk, garlic powder, salt, and pepper. Mix well.

Layer in Baking Dish

Pour the mixture into the greased baking dish and spread evenly. Sprinkle grated Parmesan cheese on top.

Bake the Casserole

Bake in the preheated oven for 40-45 minutes or until the top is golden brown and the casserole is set.

Serve and Enjoy

Let it cool slightly before serving. Enjoy the casserole warm, paired with your favorite bread or salad.

This casserole is perfect for meal prep; it reheats beautifully!

Pro Tips

For added flavor, consider mixing in herbs such as oregano or basil. You can also experiment with different types of cheese based on your preferences.

Make-Ahead and Storage

This Baked Zucchini Spinach Casserole is a great make-ahead option. You can prepare the filling a day in advance and store it in the refrigerator for quick assembly the next day. Just allow it to come to room temperature before baking to ensure even cooking. Additionally, leftover casserole can be stored in an airtight container for up to three days in the fridge, making it perfect for meal prep. Just remember that reheating may slightly change the texture, but it will still taste delicious.

For longer storage, this casserole can be frozen. Allow it to cool completely, then wrap it tightly in plastic wrap and foiled before freezing. To reheat, simply bake from frozen at 375°F (190°C) for about 50-60 minutes, or until warmed through. If you prefer, you can also slice it into portions before freezing for easier reheating. Each portion can be thawed individually and warmed in the microwave or oven.

Serving Suggestions

Serving this casserole warm with a side of crusty bread makes for a comforting meal. You can also pair it with a light salad, such as a simple arugula or spinach salad dressed with lemon vinaigrette. The fresh flavors of the salad will beautifully complement the richness of the casserole. If you want to elevate the meal, consider topping it with a dollop of Greek yogurt or sour cream once served, providing a tangy contrast that enhances the overall flavor profile.

For a heartier version, consider adding protein such as shredded chicken or cooked quinoa to the filling before baking. This not only boosts the nutritional content but also makes the casserole more filling. Experimenting with additional veggies like bell peppers or mushrooms can add an extra layer of flavor too, allowing you to tailor the dish to what you have on hand or your personal taste preferences.

Questions About Recipes

→ Can I use frozen spinach for this recipe?

Yes, just be sure to thaw and drain it well to avoid excess moisture.

→ Is there a dairy-free option?

Absolutely! You can substitute the cheese with plant-based alternatives and use almond milk.

→ How do I store leftovers?

Store any leftovers in an airtight container in the fridge for up to 3 days.

→ Can I add other vegetables?

Definitely! Bell peppers, mushrooms, or even eggplant would be great additions.