Name: Zucchini Casserole Recipe
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Cuisine: American
Ingredients: 4 medium zucchinis, sliced; 1 cup shredded mozzarella cheese; 1 cup shredded cheddar cheese; 3 large eggs; 1 sweet onion, finely chopped; 1 tsp garlic powder; 1 cup seasoned breadcrumbs; 2 tbsp olive oil; Salt and pepper to taste

Jump to Recipe

If you’re looking for a dish that brings together comfort, vibrant garden freshness, and irresistible cheesy flavor, this Zucchini Casserole is about to become your new go-to recipe. Whether you’re wrangling an abundance of summer squash or trying to sneak extra veggies onto the dinner table, the tender layers of zucchini, bubbly cheeses, and golden, crispy topping make every bite a celebration. This casserole is as perfect for weeknight dinners as it is for potlucks, and it’s the kind of recipe that has everyone asking for seconds!

Zucchini Casserole Recipe - Recipe Image

Ingredients You’ll Need

This Zucchini Casserole relies on just a handful of simple kitchen staples, each one building rich layers of flavor and texture. Don’t underestimate how these everyday ingredients can come together for something truly special.

Zucchini: The star of the show! Slice them evenly for perfect tenderness and texture in every forkful.
Mozzarella cheese: Melts beautifully, adding creaminess and a lovely stretch to the casserole.
Cheddar cheese: Brings sharp, robust flavor that balances the mild zucchini and buttery mozzarella.
Eggs: Act as the binding agent, giving the casserole structure without making it heavy.
Sweet onion: Adds a touch of sweetness and depth; chop it finely so it blends evenly.
Garlic powder: Gives savory warmth without overpowering the delicate vegetables.
Seasoned breadcrumbs: Provide the perfect crispy, golden topping—an essential textural contrast.
Olive oil: For sautéing, which brings out the zucchini and onion’s natural sweetness.
Salt and pepper: Don’t skip these; they amplify all the other flavors!

How to Make Zucchini Casserole

Step 1: Prep Your Baking Dish and Oven

Start by preheating your oven to 375°F (190°C). This ensures the Zucchini Casserole bakes evenly and gets that irresistible bubbling golden top. Lightly grease a 9×13-inch baking dish so nothing sticks (and cleanup stays easy).

Step 2: Sauté the Onions

Pour the olive oil into a skillet over medium heat, then add your finely chopped sweet onion. Sauté for about five minutes, stirring occasionally, until the onions turn soft and translucent. This gentle cooking draws out their sweetness and sets a flavorful base for your casserole.

Step 3: Soften the Zucchini

Once the onions are ready, toss in the sliced zucchini along with the garlic powder. Sauté everything together for another 3 to 4 minutes. You’re looking for the zucchini to soften slightly (but not turn mushy)—they’ll finish cooking in the oven!

Step 4: Whisk the Eggs

In a separate bowl, crack in your eggs and season with salt and pepper. Whisk until everything is well combined, creating a smooth, golden mixture. This is what will hold the casserole together as it bakes.

Step 5: Combine Everything

Time to bring the magic together! In a large mixing bowl, combine the sautéed zucchini and onions with both cheeses and the egg mixture. Gently fold everything until the veggies are coated and the cheeses are well distributed—a little messy, but worth it!

Step 6: Assemble and Bake

Pour the cheesy zucchini mixture into your prepared baking dish and smooth out the top. Sprinkle the seasoned breadcrumbs evenly over the entire surface. Slide it into the oven and bake for 30 to 35 minutes, or until the top is golden brown and the casserole is set. You’ll smell when it’s getting close—irresistible!

How to Serve Zucchini Casserole

Garnishes

Bring an extra flourish to your Zucchini Casserole with fresh garnishes! Sprinkle chopped parsley, basil, or a handful of extra shredded cheese over the hot casserole just before serving. Even a drizzle of good-quality olive oil can elevate the final touch.

Side Dishes

This casserole pairs beautifully with so many sides. Try a crisp green salad with a tangy vinaigrette, roasted chicken, or a hearty bowl of tomato soup for a coordinated meal. The mild flavor of zucchini lets you be creative with your accompaniments.

Creative Ways to Present

For special occasions, portion the Zucchini Casserole into ramekins for individual servings or arrange grilled vegetables around it for a stunning buffet centerpiece. You can even serve leftovers as a brunch main next to eggs and toast for a fresh twist!

Make Ahead and Storage

Storing Leftovers

Once cooled, cover leftover Zucchini Casserole tightly with foil or transfer to an airtight container. Pop it in the fridge—your casserole will stay perfectly fresh for up to 3 days and tastes even better as the flavors meld!

Freezing

This dish is a meal-prepper’s dream. Simply wrap portions of Zucchini Casserole individually or cover the whole dish well to prevent freezer burn. It keeps nicely for up to 2 months. Thaw in the refrigerator overnight before reheating.

Reheating

To bring your casserole back to bubbly, irresistible life, reheat leftovers in a 350°F (175°C) oven for about 15 to 20 minutes. A quick zap in the microwave works for single servings, but the oven keeps that lovely crispy topping intact.

FAQs

Can I use yellow squash instead of zucchini?

Absolutely! Yellow squash is a fantastic substitute and can be mixed with zucchini for color and flavor variety. The casserole will still turn out delicious.

What can I use instead of breadcrumbs for a gluten-free version?

Try crushed gluten-free crackers or gluten-free panko breadcrumbs. You’ll get the same crispy effect without the gluten!

Can I prepare Zucchini Casserole ahead of time?

Yes, you can assemble the casserole up to a day in advance. Just cover and refrigerate, then bake when ready—add a few extra minutes to accommodate the chilled ingredients.

Do I have to peel the zucchini?

No need! The zucchini skin softens beautifully in the oven and adds color and nutrients. Plus, skipping the peeling step saves prep time.

Can I add protein to this dish?

Certainly. Cooked, crumbled sausage or diced rotisserie chicken make tasty additions. Just fold them in with the zucchini and cheeses before baking for a more filling meal.

Final Thoughts

I can’t wait for you to experience how delicious and versatile this Zucchini Casserole truly is. It’s the ultimate comfort food that celebrates fresh, simple ingredients with layers of stunning flavor. Whether you’re enjoying it straight from the oven or sneaking a leftover slice the next day, it’s guaranteed to win you over. Give it a try, and let it become your new kitchen tradition!

Zucchini Casserole Recipe

★★★★★

5.1 from 24 reviews

Author: Zoe
Total Time: 50 minutes
Yield: 6 servings 1x
Diet: Vegetarian

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Description

This Zucchini Casserole is a flavorful and cheesy dish that makes a perfect side or main course option. With layers of zucchini, eggs, two types of cheese, and breadcrumbs, this casserole is a delicious way to enjoy fresh zucchinis.

Ingredients

Scale

Zucchini Casserole:

4 medium zucchinis, sliced
1 cup shredded mozzarella cheese
1 cup shredded cheddar cheese
3 large eggs
1 sweet onion, finely chopped
1 tsp garlic powder
1 cup seasoned breadcrumbs
2 tbsp olive oil
Salt and pepper to taste

Instructions

Preheat the Oven: Preheat oven to 375°F (190°C) and grease a 9×13-inch baking dish.
Sauté Onion: In a skillet over medium heat, heat olive oil and sauté the chopped onion until translucent (about 5 minutes).
Cook Zucchini: Add sliced zucchini and garlic powder; sauté until slightly softened (3-4 minutes).
Prepare Egg Mixture: In a bowl, whisk together eggs, salt, and pepper.
Combine Ingredients: Combine sautéed vegetables with cheeses and egg mixture in a large bowl; mix gently.
Assemble and Bake: Pour the mixture into the prepared baking dish, top with breadcrumbs, and bake for 30-35 minutes or until golden brown.