Baked Zucchini Casserole

Embrace the wholesome flavors of garden-fresh zucchini and rich cheese sauce with our delectable Baked Zucchini Casserole recipe. This comforting dish layers tender zucchini slices with a creamy cheese sauce, creating a satisfying meal that’s perfect for any occasion. With straightforward ingredients and easy-to-follow steps, you can whip up this flavorful casserole in no time, making it an ideal addition to your weeknight dinner rotation or special gatherings with loved ones.


  • 3 small zucchini (about 4 cups sliced)
  • 2 teaspoons kosher salt
  • 2 tablespoons olive oil
  • 1 yellow onion, diced
  • 2 cloves garlic, minced
  • 1 green onion, thinly sliced
  • 1 cup heavy whipping cream
  • 1 cup shredded cheddar cheese
  • 1/4 cup Parmesan cheese, shredded
  • 1/2 teaspoon ground black pepper
  • 2 large eggs
  • 1 1/2 cups crumbled fresh mozzarella cheese (or shredded)


  1. Begin by preparing the zucchini: Slice it thinly and lay the slices on a tray lined with a clean tea towel or paper towel. Sprinkle salt over the slices to draw out excess water. After 10-15 minutes, flip the slices and repeat the process. Pat dry with a clean towel.
  2. Preheat your oven to 400°F (200°C).
  3. In a skillet, heat olive oil over medium heat. Sauté the diced onion and minced garlic until fragrant, about 2 minutes. Add the sliced green onion (white part only) and cook until translucent.
  4. Add the heavy cream, cheddar cheese, and Parmesan cheese to the skillet. Stir until the cheese is melted and the sauce is slightly thickened. Remove from heat.
  5. Season the cheese mixture with ground black pepper, then add the beaten eggs. Whisk until well combined.
  6. In a 9-inch round baking pan, arrange 1/3 to 1/4 of the zucchini slices on the bottom.
  7. Pour a portion of the creamy sauce over the zucchini slices, then sprinkle with mozzarella cheese. Repeat this layering process until all the zucchini, sauce, and mozzarella cheese are used up.
  8. Bake the casserole for 20 minutes or until the zucchini is fork-tender and the cheese is golden and bubbly.
  9. Serve the Baked Zucchini Casserole warm, and savor each creamy, flavorful bite!

Serving and Storage Tips:

  1. Serve Warm: Enjoy the Baked Zucchini Casserole fresh out of the oven while it’s still warm and bubbling with melted cheese for the best flavor and texture.
  2. Garnish Options: Enhance the presentation and flavor by garnishing each serving with freshly chopped herbs such as parsley, basil, or thyme.
  3. Pairing Suggestions: Serve this comforting casserole alongside a crisp green salad dressed with a light vinaigrette or roasted vegetables for a well-balanced meal.
  4. Leftover Delights: Store any leftover casserole in an airtight container in the refrigerator for up to 3-4 days. Reheat individual portions in the microwave or oven until heated through before serving.
  5. Freeze Ahead: If you wish to freeze portions for future meals, allow the casserole to cool completely, then wrap tightly in plastic wrap and aluminum foil or place in a freezer-safe container. Label with the date and freeze for up to 2-3 months. Thaw overnight in the refrigerator before reheating.
  6. Reheating Tips: To reheat frozen or refrigerated portions, place them in a preheated oven at 350°F (175°C) for about 15-20 minutes or until heated through. Alternatively, microwave individual servings in short intervals, stirring occasionally, until warmed to your liking.
  7. Customize Portions: Adjust the serving size based on your needs by doubling or halving the ingredients to accommodate larger or smaller gatherings.
  8. Make Ahead: Save time on busy weeknights by preparing the casserole components in advance. Slice the zucchini and prepare the cheese sauce ahead of time, then assemble and bake the casserole when ready to serve.
  9. Transporting Tips: If taking the casserole to a potluck or gathering, cover it securely with foil and transport in an insulated carrier to keep it warm.
  10. Enjoy Cold: While best served warm, leftover portions of the Baked Zucchini Casserole can also be enjoyed cold straight from the refrigerator as a refreshing and tasty snack or light meal option.


  1. Mediterranean Twist: Add chopped sun-dried tomatoes, Kalamata olives, and crumbled feta cheese between the layers for a Mediterranean-inspired flavor profile.
  2. Tex-Mex Flavor: Incorporate cooked and seasoned ground beef or turkey seasoned with taco seasoning for a Tex-Mex twist. Serve with salsa, sour cream, and sliced avocado on the side.
  3. Herb Infusion: Mix chopped fresh herbs such as basil, parsley, or oregano into the cheese sauce for an added burst of freshness and flavor.
  4. Vegetarian Option: Make it a vegetarian delight by substituting the chicken broth with vegetable broth and adding layers of sautéed spinach, mushrooms, or bell peppers.
  5. Protein Boost: Enhance the protein content by layering cooked and crumbled sausage, diced ham, or grilled chicken breast between the zucchini and cheese sauce layers.
  6. Spice It Up: Add a kick of heat by mixing chopped green chilies or jalapeños into the cheese sauce or sprinkling red pepper flakes between the layers.
  7. Creamy Mushroom Addition: Sauté sliced mushrooms in butter until golden brown and add them as an additional layer in the casserole for extra earthy flavor and texture.
  8. Italian-Inspired: Incorporate layers of marinara sauce and shredded Italian cheese blend between the zucchini slices for a hearty Italian-inspired twist.
  9. Cheese Lover’s Dream: Experiment with different types of cheese such as Gouda, Swiss, or fontina to create a unique and indulgent flavor combination.
  10. Nutty Crunch: Sprinkle toasted breadcrumbs or crushed nuts (such as almonds or walnuts) on top of each layer for added texture and crunch.

FAQs :

  1. Can I use other types of squash instead of zucchini? Yes, you can substitute zucchini with yellow squash, pattypan squash, or a combination of different squash varieties.
  2. Can I make this dish ahead of time? Absolutely! You can assemble the casserole in advance, cover it tightly with foil, and refrigerate it overnight. When ready to bake, simply remove it from the refrigerator and bake as directed, adding a few extra minutes to the cooking time if needed.
  3. Can I make this casserole gluten-free? Yes, you can make this recipe gluten-free by using gluten-free breadcrumbs or omitting them altogether.
  4. What can I serve with this zucchini casserole? This casserole pairs well with a variety of dishes such as grilled chicken, steak, or fish. It also complements pasta dishes, rice pilaf, or a simple green salad.
  5. Can I use frozen zucchini instead of fresh? While fresh zucchini is recommended for this recipe, you can use frozen zucchini slices that have been thawed and drained. However, be aware that frozen zucchini may release more moisture during cooking.
  6. How do I know when the casserole is done baking? The casserole is done when the zucchini slices are fork-tender, and the cheese is golden and bubbly on top.
  7. Can I make this dish dairy-free? Yes, you can make a dairy-free version of this casserole by using dairy-free cheese alternatives and a plant-based milk or cream substitute.
  8. Can I add meat to this casserole? Certainly! Cooked and crumbled bacon, diced ham, or shredded rotisserie chicken can be added between the layers for extra protein and flavor.
  9. How long will leftovers last in the refrigerator? Leftover casserole can be stored in the refrigerator for 3-4 days when properly stored in an airtight container.
  10. Can I freeze this casserole for later? Yes, this casserole can be frozen before or after baking. If freezing before baking, assemble the casserole as directed, cover tightly with foil, and freeze. When ready to bake, thaw in the refrigerator overnight and bake as directed. If freezing leftovers, cool the casserole completely, then portion into individual servings, wrap tightly, and freeze. Reheat in the oven or microwave when ready to serve.

Elevate your dinner table with our irresistible Baked Zucchini Casserole. Packed with wholesome ingredients and bursting with creamy, cheesy goodness, this dish is sure to become a family favorite. Whether enjoyed as a satisfying side dish or a hearty vegetarian main course, this zucchini casserole is a comforting and delicious addition to any mealtime repertoire. Try it today and treat your taste buds to a delightful culinary experience!