Zucchini Casserole Recipe

Craving comfort food that feels both fresh and satisfying? Zucchini Casserole is the answer—a bubbling, golden-topped bake that brings together tender zucchini, sweet onions, creamy cheeses, and a crunchy breadcrumb finish. Whether you’re trying to use up a bounty of summer squash or simply searching for a cozy family favorite, this dish always delivers. The subtle garlic and the contrast between gooey and crisp textures make every bite irresistible. Trust me, this is one recipe you’ll want to revisit all season long.

Zucchini Casserole Recipe - Recipe Image

Ingredients You’ll Need

Pulling together this flavorful Zucchini Casserole couldn’t be easier, thanks to its straightforward ingredient list. Each component plays a key part, from adding creaminess and crunch to infusing mouthwatering aroma and flavor throughout the dish.

  • Zucchinis: The star! Choose firm, medium zucchinis for the freshest taste and best texture.
  • Mozzarella Cheese: Melts beautifully into the casserole, giving a creamy, stretchy quality.
  • Cheddar Cheese: Adds a richer, slightly sharp flavor to balance the mild zucchini.
  • Eggs: Bind everything together, creating that classic casserole structure.
  • Sweet Onion: Provides a gentle sweetness and savory depth as the flavor base.
  • Garlic Powder: Easily infuses the veggies with a subtle, irresistible garlicky essence.
  • Seasoned Breadcrumbs: Deliver a perfectly toasted, aromatic crunch on top.
  • Olive Oil: Helps soften the veggies and enhances overall richness.
  • Salt and Pepper: Essential for seasoning—don’t forget to taste as you go!

How to Make Zucchini Casserole

Step 1: Prep the Oven and Dish

Start by heating your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish with a bit of olive oil or nonstick spray. This creates the perfect surface for the casserole, making cleanup a breeze and ensuring nothing sticks as it bakes to golden perfection.

Step 2: Sauté Onions

In a skillet over medium heat, warm your olive oil before adding the finely chopped sweet onion. Sauté, stirring frequently, until the onions turn translucent and fragrant—about five minutes. This step builds deep flavor and sweetness right from the start.

Step 3: Cook Zucchini and Garlic

Toss in your sliced zucchini and sprinkle over the garlic powder. Sauté until the zucchini just begins to soften—about three to four minutes. You want the zucchini tender but not mushy, as it will continue cooking in the oven.

Step 4: Whisk the Egg Mixture

While your veggies are cooling slightly, whisk together the eggs in a medium bowl with a generous pinch each of salt and pepper. This simple mixture will set up the casserole, holding all those tasty ingredients together.

Step 5: Combine Everything

In a large bowl, gently mix the sautéed zucchini and onion with the whisked eggs, shredded mozzarella, and cheddar cheese. Combine until every bite promises a little bit of each flavor. Be careful not to overmix—you want the ingredients to remain distinct.

Step 6: Assemble and Bake

Pour your zucchini-cheese mixture into the prepared baking dish and smooth it out evenly. Sprinkle the seasoned breadcrumbs over the top for that irresistible crispy crust. Slide it into the oven and bake for 30 to 35 minutes, or until the casserole is bubbly and the topping is gorgeously golden.

How to Serve Zucchini Casserole

Zucchini Casserole Recipe - Recipe Image

Garnishes

Sprinkle freshly chopped parsley, basil, or even a handful of sliced chives over the piping hot Zucchini Casserole just before serving. Not only does this add a pop of color, but these delicate herbs also bring a burst of freshness that complements the rich, cheesy flavors beautifully.

Side Dishes

Pair your Zucchini Casserole with a simple green salad tossed in lemon vinaigrette, or serve it alongside juicy baked chicken or grilled fish for a well-rounded meal. Some crusty bread on the side never hurts, either, perfect for scooping up every last delicious bite.

Creative Ways to Present

If you’re hosting, try portioning the casserole into individual ramekins for an elegant twist. Or, for a brunch buffet, cut the cooled casserole into neat squares and arrange them on a platter with toothpicks—guaranteed to impress! Leftovers also make a fantastic filling for wraps or toasted sandwiches the next day.

Make Ahead and Storage

Storing Leftovers

Let any extra Zucchini Casserole cool fully, then cover tightly with foil or transfer portions to airtight containers. It’ll keep for up to four days in the fridge, making it a wonderful option for easy lunches or quick dinners throughout the week.

Freezing

For longer storage, freeze slices or the whole casserole wrapped well in plastic wrap and foil. Label and date the package, and you’ll have a quick, homemade meal ready to enjoy for up to three months. Thaw overnight in the fridge before reheating for best results.

Reheating

To reheat, place slices or the entire baked Zucchini Casserole in a 350°F oven, covered loosely with foil, for about 15 to 20 minutes. For a crispier topping, uncover the last few minutes. The microwave works in a pinch for individual portions, though the breadcrumb crust is best restored in the oven.

FAQs

Can I use yellow squash instead of zucchini?

Absolutely! Yellow squash has a similar taste and texture, so feel free to use them interchangeably, or mix half and half for a colorful twist on your Zucchini Casserole.

What can I substitute for mozzarella or cheddar cheese?

Try Monterey Jack, fontina, or even a little parmesan for a different flavor profile. Just be sure to use cheeses that melt well for the signature creamy texture.

Is it possible to make this casserole gluten-free?

Definitely! Swap the seasoned breadcrumbs with your favorite gluten-free version, or pulse gluten-free crackers in a food processor with Italian herbs for a similar crunchy topping.

Can I prep this casserole ahead of time?

Yes, you can assemble the entire Zucchini Casserole up to a day ahead. Cover it and store in the fridge, then let it come to room temperature while your oven preheats before baking as directed.

How do I prevent the casserole from becoming watery?

To avoid excess moisture, consider salting the sliced zucchini and letting it rest for 10–15 minutes, then patting dry with paper towels before sautéing. This extra step helps concentrate flavors and keeps your casserole firm.

Final Thoughts

If you’ve never tried making Zucchini Casserole, there’s no better time to start. Its warm, gooey layers and crisp topping are sure to win over even the staunchest veggie skeptics. Go ahead and whip it up for your next family gathering—one bite and it just might become your new go-to comfort dish!

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Zucchini Casserole Recipe

This Zucchini Casserole is a delightful and cheesy dish that makes a perfect side or main course. With layers of zucchini, flavorful cheeses, and a crunchy breadcrumb topping, it’s a satisfying and flavorful option for any meal.

  • Author: Rita
  • Prep Time: 15 minutes
  • Cook Time: 35 minutes
  • Total Time: 50 minutes
  • Yield: 6 servings 1x
  • Category: Main Dish
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

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

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

Notes

  • You can customize this casserole by adding other vegetables or using different types of cheeses.
  • Make sure to let the casserole cool slightly before serving to allow it to set.

Nutrition

  • Serving Size: 1 serving
  • Calories: 320
  • Sugar: 5g
  • Sodium: 580mg
  • Fat: 20g
  • Saturated Fat: 9g
  • Unsaturated Fat: 9g
  • Trans Fat: 0g
  • Carbohydrates: 20g
  • Fiber: 3g
  • Protein: 16g
  • Cholesterol: 160mg

Keywords: Zucchini Casserole, Cheesy Zucchini Bake, Vegetable Casserole

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