Zucchini Casserole Recipe

If you’re looking for a cozy, flavor-packed weeknight dinner that celebrates summer vegetables, look no further than this Zucchini Casserole. Creamy cheeses, tender zucchini, and a golden, crunchy topping all come together in one bubbling dish that’s as easy to make as it is delicious. Whether you’re serving vegetarians, picky eaters, or anyone who just loves hearty comfort food, this recipe is guaranteed to win everyone over with its melt-in-your-mouth texture and homey aroma.

Ingredients You’ll Need

The beauty of this Zucchini Casserole is in its simple ingredient list. Each item adds its own distinct note, contributing to an irresistibly tasty creation with layers of flavor, texture, and color. Here’s what you’ll need and why it matters:

• 4 medium zucchinis: Fresh zucchini is the star, bringing a sweet mildness and soft, satisfying bite.
• 1 cup shredded mozzarella cheese: Mozzarella lends creamy meltiness that holds everything together beautifully.
• 1 cup shredded cheddar cheese: Cheddar adds sharp, tangy richness and helps create a gorgeous golden top.
• 3 large eggs: Eggs bind the casserole, giving it structure while keeping it light and fluffy.
• 1 sweet onion, finely chopped: Sweet onions mellow in the oven and complement the zucchini with their gentle flavor.
• 1 tsp garlic powder: Garlic powder infuses the whole dish with warm, aromatic depth.
• 1 cup seasoned breadcrumbs: The crunchy topping adds a toasty finish and soaks up all those savory juices.
• 2 tbsp olive oil: Olive oil softens the onion and zucchini, and brings out their natural sweetness.
• Salt and pepper to taste: Just a pinch balances and highlights every other flavor in the casserole.

How to Make Zucchini Casserole

Step 1: Prep Your Oven and Baking Dish

Begin by preheating your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish with a little olive oil or nonstick spray. This quick step ensures nothing sticks and makes cleanup a breeze, so you can focus on the delicious part—eating!

Step 2: Sauté Onion to Sweet Perfection

In a skillet over medium heat, heat up the olive oil and add your finely chopped sweet onion. Sauté until the onion turns soft and translucent, about five minutes. This gentle cooking brings out the onion’s natural sweetness without overpowering the delicate zucchini flavor later on.

Step 3: Add Zucchini and Garlic Powder

Toss the sliced zucchini and garlic powder into the skillet with the onions. Sauté gently until the zucchini softens just slightly—around three or four minutes. This step not only sweetens the flavors but removes a bit of excess moisture so your Zucchini Casserole won’t turn watery.

Step 4: Whisk Up the Eggs

Crack the eggs into a bowl and whisk in salt and pepper to taste. The eggs are the glue that holds your casserole together, ensuring every forkful is creamy and cohesive. Be generous with your whisking to blend everything smoothly and evenly.

Step 5: Combine Everything Wonderful

Transfer your sautéed vegetables to a large bowl, then fold in the mozzarella, cheddar, and whisked eggs. Gently toss everything until the mixture is well-combined but not mushy—you want distinct bites of cheesy zucchini in every serving.

Step 6: Assemble and Bake to Golden Glory

Pour your mixture into the greased baking dish, spreading evenly. Sprinkle the seasoned breadcrumbs all over the top for a beautiful, crunchy crust. Slide it into the oven and bake for 30 to 35 minutes, or until the casserole is golden brown and bubbling at the edges. Let it rest a few moments before serving for easiest slicing!

How to Serve Zucchini Casserole

Garnishes

Just before serving, add a finishing touch by scattering a handful of chopped fresh herbs like basil, parsley, or chives across the top. A light dusting of parmesan or an extra twist of cracked black pepper adds a lovely aroma and a little extra flair.

Side Dishes

Zucchini Casserole makes a brilliant centerpiece, but it also loves company! Pair it with a fresh green salad, a slice of crusty garlic bread, or a heaping spoonful of fluffy rice or quinoa to round out the meal. Roasted chicken or grilled fish also make wonderful accompaniments for a hearty dinner.

Creative Ways to Present

For a fun, personal touch, scoop the casserole into individual ramekins before baking for cute, single-serve portions. Another twist—turn it into a brunch star by layering the baked casserole slices onto toasted English muffins with a fried egg on top.

Make Ahead and Storage

Storing Leftovers

If you’re lucky enough to have leftovers, let the casserole cool completely, then cover the baking dish tightly with foil or plastic wrap. Store in the refrigerator for up to three days—the flavors only get better as they mingle!

Freezing

Zucchini Casserole freezes very well. Simply slice into individual portions, wrap each in plastic wrap, and pop them into a freezer bag or airtight container. They’ll stay fresh for up to two months. Defrost overnight in the fridge for best results.

Reheating

Reheat individual portions in the microwave for a quick lunch, or warm the whole casserole in a 350°F oven until hot and bubbly. Add a fresh sprinkle of breadcrumbs just before heating to crisp up the top again.

FAQs

Can I use other types of cheese in Zucchini Casserole?

Absolutely! Feel free to swap in Swiss, gouda, or even a smoky provolone for a different flavor profile. Mixing cheeses keeps this casserole exciting and personalized every time.

Should I peel the zucchini before using it?

There’s no need to peel the zucchini—the skin adds a lovely color, tender bite, and extra nutrition. Just give them a thorough wash before slicing!

Can I make Zucchini Casserole gluten-free?

Of course! Just use your favorite gluten-free breadcrumbs in place of regular seasoned breadcrumbs. Everything else about the recipe stays the same.

Is it possible to prepare Zucchini Casserole ahead of time?

Yes—assemble the casserole the night before, cover tightly, and refrigerate. The next day, bring it to room temperature while the oven preheats, then bake as directed for a super easy mealtime solution.

What can I do if my casserole seems watery?

Zucchini naturally holds a lot of moisture. If you want to be extra cautious, sprinkle a little salt on the sliced zucchini and let it sit for 10-15 minutes, then dab off the excess liquid before sautéing. This helps keep your casserole firm and sliceable.

Final Thoughts

Few things are as satisfying as a bubbling dish of homemade Zucchini Casserole shared with people you love. Give this recipe a spot on your table and you’re sure to see smiles all around—happy cooking!

Print