Easy Cheesy Zucchini Casserole Recipe
Introduction
This Easy Cheesy Zucchini Casserole is a delicious and comforting way to enjoy fresh zucchini. With a creamy cheese sauce and a crunchy breadcrumb topping, it’s perfect as a side dish or a light main course.

Ingredients
- 4 cups zucchini, diced into 1 inch pieces
- 1 cup mayonnaise
- 1 cup shredded cheddar cheese
- 2 eggs, slightly beaten
- 1 tsp pepper
- 3/4 – 1 tsp garlic powder
- 1/4 cup panko breadcrumbs
- 1 Tbsp butter, melted
Instructions
- Step 1: Bring a pot of water to a boil. Add the diced zucchini and cook for 3 minutes. Drain well and allow to cool.
- Step 2: In a large bowl, combine the cooled zucchini with mayonnaise, shredded cheddar cheese, beaten eggs, pepper, and garlic powder. Mix until evenly combined.
- Step 3: Grease a 1 1/2 quart baking dish and pour the zucchini mixture into it, spreading evenly.
- Step 4: In a small bowl, mix the panko breadcrumbs with melted butter. Sprinkle this mixture evenly over the top of the casserole.
- Step 5: Bake the casserole uncovered at 350°F (175°C) for 35 minutes, or until the zucchini is fork tender and the topping is golden brown.
Tips & Variations
- For extra flavor, add a handful of chopped fresh herbs like parsley or thyme to the zucchini mixture before baking.
- Swap out cheddar for mozzarella or Monterey Jack for a different cheesy twist.
- Use Italian-style breadcrumbs instead of plain panko for a seasoned crust.
- If you prefer a creamier texture, stir in 1/4 cup of sour cream or Greek yogurt with the mayonnaise.
Storage
Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in the oven at 350°F until warmed through to retain the crispy topping. Avoid microwaving to keep the crust crunchy.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use frozen zucchini for this casserole?
It’s best to use fresh zucchini for this recipe because frozen zucchini can release excess water and make the casserole watery. If you must use frozen, be sure to thaw and squeeze out as much moisture as possible before using.
Can I prepare this casserole ahead of time?
Yes, you can assemble the casserole the day before. Cover and refrigerate it, then add the breadcrumb topping just before baking for best texture.
PrintEasy Cheesy Zucchini Casserole Recipe
This Easy Cheesy Zucchini Casserole is a comforting, creamy, and flavorful baked dish perfect for using fresh zucchini. Featuring a cheesy mayo and egg mixture topped with buttery Panko breadcrumbs, it offers a delightful combination of textures and tastes, ideal as a side or light main dish.
- Prep Time: 10 minutes
- Cook Time: 35 minutes
- Total Time: 45 minutes
- Yield: 6 servings 1x
- Category: Casserole
- Method: Baking
- Cuisine: American
Ingredients
Zucchini Mixture
- 4 cups Zucchini, diced into 1 inch pieces
- 1 cup Mayonnaise
- 1 cup Shredded Cheddar Cheese
- 2 Eggs, slightly beaten
- 1 tsp Pepper
- 3/4 – 1 tsp Garlic Powder
Topping
- 1/4 cup Panko Breadcrumbs
- 1 Tbsp Butter, melted
Instructions
- Parboil the Zucchini: Bring a pot of water to a boil and add the diced zucchini. Cook for 3 minutes until slightly tender but not fully cooked. Drain and allow to cool completely to prevent excess moisture in the casserole.
- Combine the Mixture: In a large bowl, mix the cooled parboiled zucchini with mayonnaise, shredded cheddar cheese, beaten eggs, pepper, and garlic powder until well incorporated.
- Prepare the Baking Dish: Grease a 1 1/2 quart baking dish to prevent sticking, then pour in the zucchini mixture, spreading it evenly.
- Make the Topping: In a small bowl, combine the Panko breadcrumbs with melted butter. Sprinkle this mixture evenly over the top of the casserole for a crispy, golden crust.
- Bake the Casserole: Place the dish in a preheated oven at 350°F (175°C) and bake uncovered for 35 minutes, or until the zucchini is fork tender and the topping is golden brown.
Notes
- Do not overcook the zucchini when boiling to avoid soggy casserole.
- Use full-fat mayonnaise and cheese for creamier texture.
- Panko breadcrumbs can be substituted with regular breadcrumbs if needed, but Panko adds extra crunch.
- Allow the casserole to rest for 5 minutes after baking for easier serving.
- For added flavor, consider adding some chopped onions or herbs like parsley.
Keywords: Zucchini casserole, cheesy zucchini bake, easy vegetable casserole, vegetarian casserole, baked zucchini, comfort food, side dish

