If you’re looking for the perfect easy vegetable side dish that’s comforting, cheesy, and satisfying, “Cheesy Zucchini Casserole” is a great recipe to keep handy.
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Cheesy Zucchini Casserole: Easy Vegetable Side Dish
Tender zucchini casserole is combined with a creamy, spicy sauce and plenty of melted cheese, then baked until bubbly and golden brown on top.
Cheesy Zucchini Casserole is a great option for busy weeknights, but it’s also delicious to serve with Sunday dinner, a holiday meal, or a family gathering.
It’s also a great way to use up fresh zucchini in the summer, when the versatile vegetable is plentiful.
With everyday ingredients and easy preparation, this easy zucchini casserole recipe delivers rich flavor without any complicated cooking techniques.
Why is Cheesy Zucchini Casserole so popular?
- There are so many reasons to incorporate this zucchini casserole recipe into your regular dinner routine—
- Extremely easy to make
- Cheesy and creamy
- Perfect for a great vegetable side dish
- Family friendly
- Perfect for making in advance
- Perfect for using fresh zucchini.
All the ingredients needed for Cheesy Zucchini Casserole:
Ingredients for the casserole:
- 2 garlic cloves, finely chopped
- 2 tablespoons butter
- 4 medium zucchini, thinly sliced
- 1 slice of sharp cheddar cheese, grated
- 1 teaspoon Italian seasoning
- 1 cup sour cream
- 1 large egg
- 1 small yellow onion, finely chopped
- 1/4 cup grated Parmesan cheese
- 1/2 cup grated mozzarella cheese
- 1/4 teaspoon black pepper
- 1/2 teaspoon salt
- 1/2 teaspoon onion powder
- 1/2 teaspoon garlic powder
- 1/2 cup mayonnaise
Ingredients for the topping:
- 1/2 cup seasoned breadcrumbs
- 1 tablespoon melted butter
- 1/2 cup grated cheddar cheese
- 1/4 cup grated Parmesan cheese
All instructions on how to make Cheesy Zucchini Casserole:
1. Preparing the Zucchini
- Wash and dry the zucchini thoroughly.
- Cut each zucchini into thin, even golden slices.
- Zucchini contains a lot of water, so it’s crucial to remove some of the moisture before baking.
- Place the chopped zucchini in a colander and sprinkle lightly with salt.
- Let it sit for about 12 to 15 minutes.
- Pat the zucchini dry with a paper towel.
- This simple step helps prevent the casserole from becoming too watery.
2. Preheating the Oven
- Preheat the oven to approximately 375°F, 190°C.
- Use a 9×13-inch baking dish and grease it with cooking spray or a little butter.
3. Cooking the Onions and Garlic
- Melt 2 tablespoons of butter in a pan over medium heat.
- Add the chopped onion and cook for 3 to 4 minutes, or until softened.
- Add the chopped garlic and continue cooking for another 40 to 60 seconds.
- Remove the pan from the heat.
4. Making the Creamy Mixture
- Use a large bowl and combine the following ingredients:
- Mayonnaise
- Sour cream
- Garlic and onion powder
- Egg
- Italian seasoning
- Pepper
- Salt
- Keep whisking until the mixture is smooth and well combined.
- Add 1 cup cheddar cheese, 1/2 cup mozzarella, and 1/4 cup Parmesan cheese.
- Add the cooked onion and garlic and mix them all together.
5. Mixing the Zucchini
- Add the drained and patted dry zucchini slices to the bowl.
- Keep mixing slowly until the zucchini is evenly coated with the creamy cheese mixture.
- Be careful not to mix too vigorously, as the zucchini slices may break.
6. Assembling the Casserole
- Pour the zucchini mixture into the prepared baking dish.
- Spread evenly over the dish.
- Using a small bowl, combine the seasoned breadcrumbs with 1 tablespoon of melted butter.
- Sprinkle the remaining cheddar and Parmesan cheese over the zucchini.
- Finish with buttered breadcrumbs.
- The breadcrumbs add a delicious contrast to the creamy zucchini beneath the topping.
7. Baking
- First, place the casserole in the preheated oven, then bake it for about 35 minutes.
- Make sure the casserole is hot and bubbling around the edges, while the cheese on top is melted and lightly golden.
- For a more golden topping, place the casserole under the broiler for 2 minutes at the end.
- Be careful to keep an eye on it, as the cheese and breadcrumbs brown very quickly.
8. Resting Before Serving
- Remove the casserole from the oven and let it rest for 8 to 10 minutes.
- This allows the creamy filling to set and makes the casserole easier to serve.
- If you like, you can garnish it with a little chopped parsley.
Tips for a great zucchini casserole:
- Be sure to drain the water from the zucchini.
- Cut the zucchini evenly so it cooks evenly.
- Use freshly grated cheese.
- Choose sharp cheddar for more flavor.
- Be sure to let it rest.
Some easy variation suggestions:
To make this cheesy zucchini casserole even more amazing, try these variations:
Add cooked pecans: For a smoky, salty variation, add 1/2 cup cooked and crumbled cheddar and mix well before baking.
Add ground beef: Brown 1/2 pound of ground beef, then drain off any excess fat and add it to the casserole for a more filling dish.
Vegetarian: This basic recipe is already vegetarian. Add chopped mushrooms, bell peppers, or spinach for more flavor.
Trying Different Cheeses: You can replace some of the cheddar cheese with Monterey Jack, Colby Jack, Gruyère, or a mild Mexican-style cheese blend.
Adding a Spicy Kick: If you prefer a bit of spice, add a pinch of red pepper flakes or some finely chopped jalapeños to give the casserole a bit of spice.
Serving Instructions with Cheesy Zucchini Casserole:
- Creamy zucchini casseroles are great as a side dish. You can serve them with:
- Grilled Chicken Breast
- Roasted Chicken
- Meatloaf
- Baked Pork Chops
- Steak
- Burgers
- Baked Fish
- Grilled Salmon
- Roast Beef
- Turkey
- For a complete meal, serve with a simple green salad and crusty bread.
Storage Tips:
Leftover Cheesy Zucchini Casserole can be cooled to room temperature before transferring to an airtight container, then stored in the refrigerator for up to 4 days.
To reheat: Microwave individual portions until heated through.
For larger portions, reheat in the oven at 350°F until heated through.
The oven method allows the topping to retain more of its texture.
Q. Can I make Cheesy Zucchini Casserole ahead?
- Absolutely! Assemble the casserole several hours before baking.
- Prepare the zucchini mixture and place it in a greased baking dish.
- Cover and refrigerate until ready to bake.
- For the best texture, the breadcrumb topping should be set aside until just before baking.
- If baking directly from the refrigerator, the casserole may take a few minutes longer in the oven.
FAQ
Answers to Cheesy Zucchini Casserole Questions.
Q. Do you need to peel the zucchini for the casserole?
No! The zucchini skin is soft and edible, so there’s no need to peel it. Just wash the zucchini thoroughly before cutting.
Q. How to prevent the zucchini casserole from becoming watery?
The best way is to remove excess moisture from the zucchini. Salt the chopped zucchini and let it sit for 12 to 15 minutes, then pat it dry before adding it to the creamy mixture.
Q. Can I use yellow squash instead of zucchini?
Absolutely! Yellow squash can be used in place of some or all of the zucchini; the cooking process remains the same.
Q. What cheeses go best with zucchini?
Cheddar and mozzarella are great options, as cheddar enhances the flavor, and mozzarella provides a smooth, stretchy melt. Parmesan is perfect for adding a salty, slightly nutty flavor.
Q. Can I make the casserole without mayonnaise?
Absolutely! Use sour cream or plain Greek yogurt instead of mayonnaise. The taste and texture will be slightly different, but it’s still delicious.
Q. Can I add chicken to zucchini casserole?
Yes! To make this a healthier side, add cooked, grilled, or shredded chicken.
Final Thoughts
Cheesy Zucchini Casserole transforms simple zucchini into a warm, creamy, cheesy side dish that’s easy for weeknight dinners and truly special for the holiday table.
The combination of tender zucchini, Parmesan, mozzarella, creamy sauce, and crispy breadcrumbs helps deliver a rich, comforting flavor to every bite.
If you have fresh zucchini in your kitchen, there are easy recipes to transform it into something the whole family can enjoy. Serve it with roasted chicken, pork, steak, turkey, or your favorite seafood.