This Cheesy Zucchini Squash Casserole is a warm and comforting dish packed with tasty zucchini and topped with gooey cheese. It’s simple to make and full of flavor!
I mean, who doesn’t love a dish that makes veggies taste like a treat? 😄 I love serving this with a side salad for a fun, colorful meal that’s super easy on a busy night!
Key Ingredients & Substitutions
Zucchini and Yellow Squash: Both give this casserole its fresh taste. If you’re short on one, you can use more of the other or add other veggies like bell peppers or eggplant for variety.
Onion: I used a medium onion for flavor. You can replace it with shallots for a milder taste or even skip it if you’re not a fan of onions.
Cheddar and Parmesan Cheese: These cheeses melt beautifully, but if you want to try something different, mix in some mozzarella or gouda! For a lighter version, use reduced-fat cheese.
Sour Cream: This adds creaminess. You can swap it for Greek yogurt for a tangy twist, or use a non-dairy sour cream for a vegan version.
What’s the Best Way to Layer the Casserole?
Layering is key to getting even flavor and consistency in your casserole. Here’s how to do it right:
- Start with your mixed veggies at the bottom; this helps release moisture and prevents burning.
- Pour the creamy mixture over the veggies, ensuring everything is well-coated.
- Sprinkle the cheese on top last for a crispy, golden finish. Don’t forget to spread it evenly!
Let it rest after baking so it firms up; this makes serving easier and keeps the layers intact. Enjoy your cheesy delight!
Cheesy Zucchini Squash Casserole
Ingredients You’ll Need:
For the Casserole:
- 3 medium zucchini, thinly sliced
- 3 medium yellow squash, thinly sliced
- 1 medium onion, thinly sliced
For the Cheesy Mixture:
- 2 cups shredded cheddar cheese
- 1 cup grated Parmesan cheese
- 1 cup sour cream
- 2 large eggs
- 1/2 cup mayonnaise
- 1 teaspoon garlic powder
- 1/2 teaspoon black pepper
- 1 teaspoon salt
- 1/4 cup fresh parsley, chopped (optional for garnish)
How Much Time Will You Need?
This casserole takes about 15 minutes to prep, followed by 45-50 minutes of baking time. After baking, it’s good to let it rest for 5-10 minutes before serving. Altogether, you’re looking at just over an hour from start to finish!
Step-by-Step Instructions:
1. Prepare the Oven and Dish:
Start by preheating your oven to 350°F (175°C). Take a 9×13-inch baking dish and grease it with butter or non-stick spray to keep the casserole from sticking.
2. Mix the Vegetables:
In a large mixing bowl, combine the sliced zucchini, yellow squash, and onion. Give it a good toss to mix them together evenly.
3. Make the Creamy Mixture:
In another bowl, whisk together the sour cream, eggs, mayonnaise, garlic powder, salt, and black pepper until the mixture is smooth and well combined.
4. Combine Everything:
Pour the creamy mixture over the vegetables and toss everything together well to ensure the veggies are thoroughly coated.
5. Add the Cheeses:
Next, gently fold in 1 1/2 cups of the shredded cheddar cheese and 1/2 cup of the grated Parmesan cheese into the vegetable mixture.
6. Transfer to Baking Dish:
Carefully transfer the mixture to the prepared baking dish. Spread it out evenly so it bakes uniformly.
7. Top with Cheese:
Sprinkle the remaining 1/2 cup of cheddar cheese and 1/2 cup of Parmesan cheese over the top of the casserole. This will create a lovely, cheesy crust!
8. Bake It Up:
Place the casserole in the preheated oven and bake it uncovered for about 45-50 minutes, or until the top is bubbly and golden brown.
9. Rest Before Serving:
Once baked, remove the casserole from the oven, and let it rest for 5-10 minutes. This rest time helps it set and makes serving easier.
10. Garnish and Enjoy:
If you like, garnish with freshly chopped parsley before serving for a pop of color and flavor. Serve warm and enjoy your delicious cheesy zucchini squash casserole!
This dish is a creamy, cheesy delight packed with tender baked zucchini and yellow squash, perfect as a side or vegetarian main. Enjoy!
FAQ for Cheesy Zucchini Squash Casserole
Can I Use Other Vegetables?
Absolutely! You can substitute or add vegetables like bell peppers, mushrooms, or spinach for more flavor and nutrients. Just make sure to keep the overall quantity similar for the best texture.
How Should I Store Leftovers?
Store any leftovers in an airtight container in the fridge for up to 3 days. To reheat, warm gently in the oven or microwave, stirring occasionally to heat evenly. If the casserole seems dry, add a splash of milk or broth when reheating.
Can I Make This Casserole Ahead of Time?
Yes, you can prepare the entire casserole beforehand. Assemble it as instructed, then cover tightly and refrigerate for up to 24 hours. When ready to bake, just add an extra 10-15 minutes to the baking time since it will be cold from the fridge.
What Can I Serve With This Casserole?
This cheesy casserole pairs nicely with a fresh salad or grilled meats. For a complete meal, serve it alongside roasted chicken or fish. It can also be a hearty side dish to complement your favorite main courses!
