Cheesy Zucchini Casserole

Zucchini Casserole is a warm, cheesy, and comforting dish made with tender zucchini and simple flavorful ingredients. The zucchini becomes soft while baking, and the cheesy topping turns golden and delicious. It is an easy way to enjoy zucchini and makes a satisfying side dish or light meal.

This casserole is perfect for family dinners, busy weeknights, or holiday meals. Serve it warm with grilled chicken, roasted meat, or a fresh salad. It is simple to prepare, cozy, and full of homemade flavor.

Zucchini Casserole Ingredients

• 4 medium zucchini, thinly sliced
• 1 small onion, finely chopped
• 2 cloves garlic, minced
• 2 tablespoons olive oil
• 1 cup shredded mozzarella cheese
• ½ cup shredded cheddar cheese
• ½ cup sour cream
• 2 large eggs
• ½ teaspoon salt
• ¼ teaspoon black pepper
• ½ teaspoon Italian seasoning
• ¼ teaspoon garlic powder
• ½ cup breadcrumbs
• 2 tablespoons grated Parmesan cheese
• 2 tablespoons chopped fresh parsley, optional

How to Make Zucchini Casserole

Step 1: Prepare the Zucchini Mixture

Wash and thinly slice the zucchini, then gently pat the slices dry with paper towels to remove extra moisture. Heat olive oil in a large skillet over medium heat, add the chopped onion, and cook until softened. Add the garlic and zucchini, then cook for a few minutes until the zucchini begins to soften.

Step 2: Make the Creamy Mixture

In a medium bowl, whisk together the sour cream, eggs, salt, black pepper, Italian seasoning, and garlic powder. Stir until the mixture is smooth and well combined. Add the cooked zucchini and onion, then mix in the mozzarella and cheddar cheese.

Step 3: Prepare the Casserole

Preheat the oven to 375°F (190°C) and lightly grease a baking dish. Pour the zucchini mixture into the dish and spread it evenly. Sprinkle the breadcrumbs and Parmesan cheese over the top to create a golden, crunchy layer.

Step 4: Bake

Place the casserole in the preheated oven and bake for about 30–35 minutes. The zucchini should be tender, the cheese should be melted, and the top should be lightly golden and bubbling around the edges.

Step 5: Let It Rest

Remove the casserole from the oven and allow it to rest for about 5–10 minutes. This helps the creamy filling set slightly and makes it easier to serve without falling apart.

Step 6: Serve

Garnish with freshly chopped parsley if desired, then serve the Zucchini Casserole warm. It makes a delicious side dish for chicken, fish, steak, or a simple fresh salad.

Why You’ll Love This Recipe

• Easy to Make: The recipe uses simple ingredients and straightforward steps, making it perfect for beginners.
• Cheesy and Delicious: Mozzarella and cheddar melt together to create a creamy, cheesy bite.
• A Great Way to Eat Zucchini: This recipe turns fresh zucchini into a comforting dish that even picky eaters may enjoy.
• Perfect for Busy Nights: With simple preparation and one baking dish, it is an easy choice for a weeknight dinner.

Tips and Shortcuts

• Pat the zucchini dry: Use paper towels to remove extra water before cooking. This helps prevent a watery casserole.
• Use pre-shredded cheese: Save time by using ready-shredded mozzarella and cheddar.
• Cook the zucchini first: A quick cook in the skillet removes some moisture and makes the final casserole less watery.
• Prepare it ahead: Assemble the casserole earlier in the day, cover it, and keep it in the refrigerator until you are ready to bake.
• Let it rest before serving: Allow the casserole to sit for 5–10 minutes after baking. This helps it set and makes serving much easier.

What to Serve with Zucchini Casserole

This zucchini casserole is one of my favorite easy side dishes to make for my family, especially when I have fresh zucchini to use. I love serving it warm alongside grilled chicken or roasted meat, with a simple fresh salad and a glass of lemonade. My husband usually enjoys an extra helping with some warm crusty bread. The tender zucchini and cheesy, comforting flavor make this homemade casserole a dish everyone is happy to see on the table.

Frequently Asked Questions

How do I keep zucchini casserole from getting watery ?

Pat the zucchini dry before cooking and briefly sauté it to remove some of its natural moisture.

Can I use frozen zucchini ?

Yes, but fresh zucchini is better. If using frozen zucchini, thaw it completely and squeeze out as much water as possible.

Can I add meat to this casserole ?

Yes. Cooked chicken, ground beef, turkey, or sausage can be mixed into the casserole.

Can I use Greek yogurt instead of sour cream ?

Yes. Plain Greek yogurt makes a good substitute and keeps the casserole creamy.

How to Store Leftovers

Refrigerator Storage

Let the Zucchini Casserole cool slightly before storing it. Place leftovers in an airtight container or cover the baking dish tightly with foil or plastic wrap. Keep it in the refrigerator for 3–4 days. Reheat individual portions in the microwave or warm the casserole in the oven until heated through.

Freezer Storage

For longer storage, let the casserole cool completely and place it in a freezer-safe container. You can also divide it into individual portions for easy reheating. Freeze for up to 2–3 months for the best quality. Thaw overnight in the refrigerator before reheating.

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More Zucchini Recipe Ideas

Crispy Parmesan Zucchini Fries

Crispy Zucchini Fritters Recipe

Cheesy Potato Zucchini Bake