Looking for a comforting yet healthy dinner option? This Baked Zucchini Parmesan Casserole is a cheesy, flavorful dish that makes the perfect main course or side dish. It’s an excellent way to use fresh zucchini while delivering a crispy, golden topping that will leave everyone coming back for seconds. Whether you’re feeding your family or meal prepping for the week, this dinner recipe is simple, nutritious, and absolutely delicious!

Why You’ll Love This Baked Zucchini Parmesan Casserole Recipe

Healthy & Delicious – Packed with fresh zucchini and loaded with cheesy goodness.
Easy to Make – Simple ingredients and minimal prep time.
Versatile – Enjoy it as a main dish or a side.
Perfect for Meal Prep – Reheats beautifully, making it great for leftovers.

Ingredients For Baked Zucchini Parmesan Casserole Recipe

For the Casserole:

4 cups shredded zucchini (about 3–4 medium zucchinis)
½ teaspoon salt
½ cup finely chopped onion
1 tablespoon minced garlic (about 3 cloves)
2 large eggs
½ cup grated Parmesan cheese (plus 2 tablespoons for topping)
1 cup shredded mozzarella cheese
½ cup shredded cheddar cheese

For the Topping:

½ cup panko breadcrumbs (or gluten-free alternative)
2 tablespoons melted butter
2 tablespoons grated Parmesan cheese

How To Make Baked Zucchini Parmesan Casserole

1: Prep the Oven & Dish

Preheat your oven to 375°F (190°C). Grease a 1 ½-quart baking dish to prevent sticking.

2: Remove Excess Water from Zucchini

Place shredded zucchini in a colander and sprinkle with salt.
Let it sit for 10 minutes to draw out excess moisture.
Use a dish towel to squeeze out as much liquid as possible. This prevents a watery casserole.

3: Mix the Casserole Base

In a large mixing bowl, combine zucchini, onion, garlic, eggs, Parmesan, mozzarella, and cheddar cheese.
Mix well and spread evenly into the prepared baking dish.

4: Bake the Casserole

Bake uncovered for 20 minutes to help set the mixture.

5: Prepare the Crunchy Topping

In a small bowl, mix breadcrumbs, melted butter, and Parmesan cheese.
Stir until the crumbs are evenly coated.

6: Add the Topping & Finish Baking

Remove the casserole from the oven and sprinkle the buttered breadcrumbs over the top.
Return to the oven and bake for another 5–10 minutes, until golden brown and crispy.

7: Serve & Enjoy

Let the casserole cool slightly before serving. Pair it with a fresh salad or grilled protein for a complete meal!

Cooking Tips & Variations

Want a Low-Carb Version? Swap breadcrumbs for crushed pork rinds or almond flour for a keto-friendly option.
Make It Vegan – Replace eggs with a flaxseed mixture and use dairy-free cheese alternatives.
Add Protein – Mix in cooked ground turkey or shredded chicken for an extra protein boost.
Extra Crunch? Top with crushed crackers or additional Parmesan for a crispier finish.

Frequently Asked Questions

Q: Can I make this casserole ahead of time?
Yes! Assemble everything and refrigerate up to 24 hours before baking. Let it sit at room temperature for 20 minutes before putting it in the oven.
Q: How do I store leftovers?
Store in an airtight container in the fridge for up to 3 days. Reheat in the oven at 350°F (175°C) for the best texture.
Q: Can I freeze this dish?
Absolutely! Freeze the casserole before or after baking. Wrap it tightly and store it for up to 2 months. Thaw overnight in the fridge and reheat before serving.

More Healthy Dinner Recipes You’ll Love

This Baked Zucchini Parmesan Casserole is a must-try for anyone looking for a comforting, cheesy, and easy dinner recipe. Give it a try and let us know how it turns out in the comments below!