Zucchini and Squash Casserole with Cheese

Zucchini and Squash Casserole with Cheese is a comforting, cheesy, and vegetable-packed dish that turns simple summer produce into a warm, satisfying bake. Tender slices of zucchini and yellow squash are layered with onions, herbs, and a rich cheese sauce, then baked until bubbly and golden on top. The result is a casserole that’s creamy on the inside, lightly crisp on the edges, and full of savory flavor.

Perfect as a side dish or a vegetarian main, this casserole is ideal for family dinners, potlucks, or holiday tables. It’s an easy way to enjoy seasonal vegetables while indulging in a bit of cheesy comfort.

Why I Love This Recipe

I love this recipe because it’s comfort food with a wholesome twist. The zucchini and squash become tender and flavorful while the cheese brings everything together into a creamy, satisfying dish. It’s a great way to get more vegetables on the table, and even picky eaters tend to go back for seconds.

Why This Is a Must-Try Dish

• Creamy, cheesy, and packed with vegetables
• Simple ingredients and easy preparation
• Perfect as a side dish or meatless main
• Crowd-pleasing and family-friendly
• Great way to use up fresh zucchini and squash

Preparation Details

• Preparation Time: 15 minutes
• Cooking Time: 40–45 minutes
• Total Time: 55–60 minutes

Servings & Nutrition

• Servings: 6
• Calories: Approximately 260–300 calories per serving

Course & Cuisine

• Course: Side Dish / Main (Vegetarian)
• Cuisine: American

Ingredients

• 2 medium zucchini, sliced
• 2 medium yellow squash, sliced
• 1 small onion, thinly sliced
• 2 tablespoons olive oil or butter
• 2 cloves garlic, minced
• 1 cup shredded cheddar cheese
• ½ cup shredded mozzarella cheese
• ½ cup grated Parmesan cheese
• ½ cup heavy cream or whole milk
• ½ teaspoon dried thyme or Italian seasoning
• Salt and black pepper, to taste

Optional Topping

• ½ cup breadcrumbs or crushed crackers
• 1 tablespoon melted butter

Cooking Directions

1. Preheat oven to 375°F (190°C).
2. Sauté onion and garlic until softened.
3. Layer zucchini, squash, and onion in a baking dish.
4. Add cream, cheese, and seasonings.
5. Bake until bubbly and golden.

Step-by-Step Preparation Method

Step 1: Preheat and Prep

Preheat oven to 375°F (190°C). Lightly grease a baking dish.

Step 2: Sauté Aromatics

Heat olive oil or butter in a skillet over medium heat. Sauté onion for 3–4 minutes until softened. Add garlic and cook for 30 seconds.

Step 3: Assemble the Casserole

Arrange zucchini and squash slices evenly in the baking dish. Spread sautéed onions over the top.

Step 4: Add Cheese and Cream

Pour cream evenly over the vegetables. Sprinkle cheddar, mozzarella, and Parmesan cheese evenly across the top. Season with thyme, salt, and pepper.

Step 5: Add Topping (Optional)

Mix breadcrumbs with melted butter and sprinkle over the casserole for extra crunch.

Step 6: Bake

Bake uncovered for 40–45 minutes, until vegetables are tender and top is golden brown.

Step 7: Rest and Serve

Let the casserole rest for 5 minutes before serving to allow it to set.

How to Serve

• Serve warm as a side dish with grilled chicken, steak, or fish
• Enjoy as a vegetarian main with a green salad
• Pair with crusty bread or garlic bread

Recipe Tips

• Slice vegetables evenly for uniform cooking
• Lightly salt zucchini beforehand to reduce moisture
• Use freshly grated cheese for best melting
• Let casserole rest before serving for cleaner slices

Variations

Herb-Loaded Casserole

Add fresh basil, thyme, or parsley for extra flavor.

Spicy Version

Add red pepper flakes or jalapeños for heat.

Low-Carb Option

Skip breadcrumbs and use extra cheese on top.

Protein Boost

Add cooked chicken, sausage, or bacon bits.

Vegan Version

Use plant-based cream and vegan cheese alternatives.

Freezing and Storage

Refrigerator

• Store leftovers in an airtight container for up to 4 days

Freezer

• Freeze baked casserole for up to 2 months
• Thaw overnight in refrigerator before reheating

Reheating

• Reheat in oven at 350°F until warmed through
• Microwave individual portions if needed

Special Equipment Needed

• Baking dish (9×13 or similar)
• Skillet
• Cutting board and knife
• Mixing bowl

Conclusion

Zucchini and Squash Casserole with Cheese is a comforting, flavorful dish that brings out the best in simple vegetables. Creamy, cheesy, and perfectly baked, it’s a versatile recipe that works just as well for casual dinners as it does for special occasions. Whether served as a side or enjoyed as a vegetarian main, this casserole is sure to become a favorite at your table.