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If you need a low-fuss side dish packed with vegetables and melty cheese, this Zucchini Casserole is for you! No stuffing mix and cream of chicken soup are required. This made-from-scratch casserole recipe uses basic pantry staples and doesn’t skimp on flavor!

A white baking dish filled with a zucchini gratin topped with a golden, crispy breadcrumb crust. A serving spoon is placed in the dish, and a small portion has been served onto a plate in the background. A green cloth is partially visible underneath the baking dish.

It never fails. Our zucchini produces more than we can eat. Instead of giving it away, I like to make a casserole and share it with others. This is a great recipe to use if you want to send a meal to a friend who is not feeling well, to a family who just had a baby, or if you need to bring a special veggie dish to a potluck.

This Zucchini Casserole boasts a quick 15-minute prep time and will feed up to 10 people, so it’s perfect for a large crowd! It’s also a budget-friendly side dish.

If you need some more easy side dishes for your next get-together, you’ll love this Slow Cooker Mac and Cheese and Instant Pot Copycat Longhorn Steakhouse Broccoli!

gina cooking in the kitchen

✝️ Biblical Reflections Table Talk

Zucchini is a vegetable that grows in abundance, especially during the harvest season, and this zucchini casserole is a delicious way to make the most of that plentiful supply. This abundance reminds us of how God provides for us generously, giving us more than enough to share with others. In John 10:10, Jesus says, “I have come that they may have life, and have it to the full.” Just as zucchini grows vertically, reaching upwards in the garden, God’s blessings reach into every part of our lives, filling us with more than we need. As you enjoy this casserole, consider how you can use the abundance in your life to bless others and reflect God’s generosity through your hospitality.

Grab These Ingredients for Your Zucchini Casserole

You’ll need a few basic pantry staples for this easy recipe!

Ingredients for a zucchini recipe are shown, including panko breadcrumbs, shredded cheese, a whole egg, chopped onions, whipping cream, whole zucchinis, minced basil, salt and pepper, dried oregano, fresh thyme, and garlic cloves, all arranged on a white surface.
  • Zucchini: We can’t have zucchini casserole without zucchini! You’ll need around 5 medium zucchini for this recipe. The best part is that you don’t even need to peel it!
  • Heavy whipping cream: This gives our casserole a decadent, creamy texture. 
  • Egg: Binds all the ingredients together, providing a cohesive end result! 
  • Onion (yellow or white) and garlicThese are a flavorful base for the casserole. 
  • Oregano, thyme, and basil (dried): This blend of dried herbs gives the casserole a warm, comforting flavor. If you’re not a fan of this spice blend, feel free to use whatever spices you prefer. Rosemary would be another great flavor for this dish!
  • Pepper jack cheese: This slightly spicy, melty cheese is in the casserole for an ooey-gooey finish. You could also use mozzarella, feta, cheddar cheese, or parmesan cheese if you prefer. 
  • Panko breadcrumbsThese are lighter and crunchier than regular breadcrumbs, giving you that irresistible crunchy topping. 

📝 Note: You can find the full recipe with ingredients and measurements in the recipe card located at the bottom of this post.

How to Make Zucchini Casserole

The following step-by-step instructions explain how to make this delicious side dish!

number one
  • Wash and pat the zucchini dry. Slice zucchini, then cut into cubes, and toss it in a large bowl. 
Chopped zucchini pieces in a white mixing bowl on a light gray background. The zucchini is cut into small, uneven chunks with a mix of green skin and pale flesh visible.
number two
  • Whisk the egg.
A white mixing bowl with a handle contains a small amount of beaten yellow egg mixture. A whisk with a light blue handle rests inside the bowl. The scene is set on a light gray textured surface.
number three
  • Add the heavy cream, herbs, onion, garlic, cheese, and breadcrumbs. 
A white mixing bowl filled with a mixture of finely chopped vegetables and herbs in a creamy sauce, ready for preparing a dish. The background is a light grey surface.
number four
  • Toss the mixture with the zucchini until coated. 
A white mixing bowl contains chopped zucchini and a mixture of cooked quinoa, minced onions, and herbs. A light gray spatula rests in the bowl, ready for stirring. The background features a light, textured surface.
number 5
  • Spread the mixture into a baking dish. 
A white rectangular baking dish filled with chopped zucchini pieces topped with breadcrumbs. The dish is set on a light, marble-textured surface.

Gina’s Tips For Recipe Sucess

  • Remove as much moisture as possible from the zucchini before baking to prevent a watery dish. I like to use paper towels to blot off any excess moisture.
A white casserole dish filled with baked zucchini gratin topped with golden breadcrumbs. A silver serving spoon rests inside the dish, suggesting that some portions have already been taken. A green and white checkered cloth is partially visible underneath the dish.

Variation Ideas

  • If zucchini isn’t your thing, you can use yellow squash instead!
  • Feel free to throw in other veggies like bell peppers or shredded carrots for a fun twist.

Serving Suggestions

This side dish is perfect for pairing with Texas Roadhouse Herb Chicken and Chicken Baked Parmesan Meatballs! You could also add Shredded Crock Pot Chicken to the top and make it a one-dish dinner.

Is this casserole gluten-free?

Since this casserole has breadcrumbs on top, it’s not gluten-free. However, you can buy gluten-free breadcrumbs or pork panko breadcrumbs!

Can I freeze zucchini casserole?

Absolutely! You have a couple of freezing options – freeze unbaked or baked. To freeze an unbaked casserole, assemble the entire dish and wrap it tightly. Freeze for up to 3 months. When you’re ready to eat it, let it thaw at room temperature and bake as instructed. 

You can freeze baked zucchini casserole for up to 3 months. Just make sure you wrap it tightly and let it thaw at room temperature before reheating. 

Can I reheat leftover zucchini casserole?

Yes! Preheat your oven to 350ºF, cover with aluminum foil, and bake the casserole for 20 minutes.

Storing Leftovers

Allow the casserole to cool to room temperature. You can store it in the baking dish you cooked it in. Just cover the top tightly with foil. Or, you can transfer the leftovers to an airtight container. According to the FDA, cooked casseroles will last in the fridge for 3-4 days.

⚖️ Need a big batch to feed a crowd? You can easily change the number of servings in the recipe card below by tapping 2x or 3x. The ingredient measurements will automatically double or triple. You can then tap print and there you have it, a recipe for a crowd.

I Want To Answer Your Questions & Hear Your Comments

Do you have a question about this recipe❓ I will answer in the comment form below👇🏼 the recipe card. Did you make this recipe? If so, could you be a gem and leave a comment and rating ⭐️⭐️⭐️⭐️⭐️ below? This helps others find yummy 😋 recipes to make for their family and friends.

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A white rectangular baking dish filled with a golden-brown zucchini casserole topped with breadcrumbs. A silver spoon is scooping out a portion, revealing the tender, baked zucchini underneath. The dish rests on a green and white checkered cloth.
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Quick and Easy Zucchini Casserole Recipe

Prep Time: 15 minutes
Cook Time: 30 minutes
Total Time: 45 minutes
Servings: 10 servings
When life gives you fresh zucchini, make this cheesy Zucchini Casserole! It's loaded with fresh zucchini, a velvety cream sauce, herbs, cheesy pepper jack, and crunchy panko breadcrumbs! Bakes in 30 minutes and is make-ahead and freezer-friendly!

Note: Be sure to read through the recipe’s post for tips and details about this recipe.

Ingredients
 

  • 8 cups zucchini , about 5 medium
  • 1/2 cup heavy whipping cream
  • 1 egg, large
  • 1/2 cup onion , chopped in small pieces, yellow or white
  • 2 cloves garlic, minced
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper
  • 1 1/2 teaspoon oregano, dried
  • 1 teaspoon thyme , dried
  • 1 teaspoon basil , dried
  • 3/4 cup pepper jack , shredded
  • 1 cup Panko breadcrumbs, divided into ½ cups

Instructions
 

Prepare Zucchini

  • Wash the zucchini and pat dry. Slice the zucchini into 1/2-inch thick rounds, then cut each round into quarters until you have about 8 cups. Place the zucchini in a large bowl.

Preparation

  • Preheat the oven to 400°F. Spry a 9 x 13 baking dish with nonstick cooking spray.

Mix Ingredient

  • In a medium-size bowl, whisk the egg.
  • Add the heavy whipping cream, onion, garlic, salt, pepper, oregano, thyme, basil, cheese, and ½ cup of the breadcrumbs.
  • Pour the mixture into the bowl of zucchini. Carefully toss with a large spoon until well combined.

Assemble The Dish

  • Spread the zucchini mixture evenly into the greased baking dish. Sprinkle the remaining breadcrumbs evenly on top.

Bake

  • Cover the dish loosely with aluminum foil and bake for 25 minutes or until the zucchini is soft.
  • Once the zucchini is cooked, uncover the baking dish and bake for an additional 5 minutes to toast the breadcrumbs.
Serving: 1serving, Calories: 124kcal, Carbohydrates: 9g, Protein: 5g, Fat: 8g, Saturated Fat: 5g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 2g, Trans Fat: 0.002g, Cholesterol: 37mg, Sodium: 229mg, Potassium: 315mg, Fiber: 2g, Sugar: 4g, Vitamin A: 478IU, Vitamin C: 19mg, Calcium: 109mg, Iron: 1mg
Course: Side Dish
Author: Gina Dickson

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