Cheesy Zucchini Casserole Recipe – Easy Courgette Au Gratin or Cheese Bake with only 4 ingredients – Low Carb & Keto Friendly Dinner or Side Dish Idea – with the video.

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Cheesy Zucchini Casserole Recipe

This cheesy zucchini casserole is a creamy side dish that’s made with just 4 simple ingredients. It’s an easy way to use up fresh zucchini and makes a delicious low-carb side dish or meat-free meal.

Recently I found myself with 5 Zucchinis lurking in my fridge, so I put some of them to good use in this cheesy zucchini casserole with a handful of ingredients.

The cheesy bake main dish has only four simple ingredients that are easy to find at any grocery store:

• Chopped Fresh Zucchini or yellow squash
• Sour Cream
• Cream
• Cheese

Why You’ll Love This 4 Ingredient Zucchini Casserole

• Only 4 ingredients – You only need zucchini, sour cream, heavy cream and grated cheese to make this easy casserole.
• Quick and easy – Simply chop the zucchini, mix the creamy ingredients together and bake until golden brown and super cheesy.
• Creamy and cheesy – The combination of sour cream, cream and melted cheese creates a rich, comforting zucchini bake.
• A great way to use zucchini – This is an easy recipe to make when you have extra zucchini or courgettes in the fridge.
• Easy to customise – Use your favourite cheese or add optional seasonings such as garlic powder, black pepper or herbs.
• Low carb without breadcrumbs – The basic four-ingredient recipe doesn’t need breadcrumbs, making it a naturally low-carb side dish.
• Great as a side or meat-free meal – Serve it alongside chicken, beef or your favourite main course, or enjoy a generous portion on its own.

You can use any cheese you like, or pick a few to make it extra cheesy. Pick from cheddar cheese, mozzarella cheese, parmesan cheese, gruyere cheese or your cheese of choice. You could also swap the sour cream or heavy cream for mayo or cream cheese if you like instead.

I just adore the combination of sour cream and rich cream – the cheesy zucchini bake is creamy and oh so flavorful. 

I like to keep my 1/3 cup handy and then refill it with the sour cream, cream and then cheese. I tend to mix half of the cheese through the dish and top the dish with the other half so that there’s lots of cheese mixed through and topping every corner of the squash casserole.

This is also a budget-friendly recipe when zucchini is in season or on sale.

The cheesy side dish is naturally low carb and keto friendly, but you can feel free to sprinkle bread crumbs over the top of the casserole dish before it goes into the oven.

If you find yourself with any leftovers of the easy recipe then simply move the layers of zucchini with creamy cheese sauce to an airtight container and enjoy within a couple of days.

Optional Variations

Although this casserole is delicious with just four ingredients, you can customise it with garlic powder, black pepper, onion, or your favourite herbs. For a crispy topping, add breadcrumbs before baking.

Is zucchini casserole healthy?

This four ingredient zucchini casserole can be a simple way to add zucchini to your meal. It’s also naturally low in carbohydrates when made without breadcrumbs. For a lighter version, you can use reduced-fat sour cream, cream and cheese, although the full-fat version gives the casserole its richest texture.

Cheesy 4 Ingredient Zucchini Casserole Recipe

• 2 Zucchini
• 1/3 Cup Sour Cream
• 1/3 Cup Heavy Cream
• 2/3 Cup Grated Cheese

1. Preheat the oven to 180C/350F and get out a baking dish.
2. Chop the zucchini into bite sized pieces and place into the baking dish.
3. Pour over the sour cream and cream, stir to combine.
4. Add 1/3 cup of the cheese and stir through so the cheese is well mixed in.
5. Top with the remaining 1/3 cup of cheese or more to cover your zucchini with cheese to your liking.
6. Place into the preheated oven for 20 to 25 minutes or until the zucchini has cooked and the cheesy dish has a golden topping.

This delicious cheesy zucchini casserole makes an easy meat free meal or perfect side dish that’s perfect for when you’re wanting a hearty comfort food with little effort.

Cheesy Baked Zucchini Casserole Recipe Video

Here’s the video where you can see the easy zucchini casserole being prepared, step by step. Hit play below or click here to watch on YouTube.

More Easy Zucchini Recipes

Three Cheese Zucchini Bake

Zucchini and Avocado Pasta

Zucchini and Ricotta With Cabbage Noodles

4 Ingredient Zucchini Casserole FAQs

Can I make zucchini casserole without breadcrumbs?

Yes! This 4 ingredient zucchini casserole doesn’t require breadcrumbs. The cheese creates a delicious golden topping as the casserole bakes. If you prefer a crunchy topping, you can sprinkle breadcrumbs over the cheese before baking.

Can I add cream cheese to zucchini casserole?

Yes, you can swap some or all of the sour cream or heavy cream for cream cheese if you want an even richer and creamier zucchini casserole. Allow the cream cheese to soften first so it is easier to combine with the other ingredients.

Is zucchini casserole healthy?

Zucchini is a nutritious vegetable and this recipe is a simple way to include more zucchini in your meals. The basic recipe is also naturally low in carbohydrates when made without breadcrumbs. For a lighter casserole, you can use reduced-fat dairy products, although full-fat ingredients give the dish its rich and creamy texture.

What cheese is best for zucchini casserole?

You can use almost any grated cheese you enjoy. Cheddar, mozzarella, Parmesan and Gruyère all work well. You can also combine different cheeses for an extra-cheesy zucchini bake.

How do I stop zucchini casserole from becoming watery?

Zucchini naturally contains a lot of water and will release some liquid as it cooks. For the best results, use fresh zucchini and avoid adding extra liquid to the casserole. Some creamy liquid in the bottom of the dish is normal when it first comes out of the oven.

Can I make zucchini casserole ahead of time?

You can prepare the ingredients and assemble the casserole ahead of time, then cover and refrigerate until you’re ready to bake it. Because zucchini releases moisture as it sits, I prefer baking it soon after assembling for the best texture.

How do I store leftover zucchini casserole?

Allow the casserole to cool, then transfer leftovers to an airtight container and refrigerate. Enjoy within a couple of days and reheat thoroughly before serving.

Can I use courgettes instead of zucchini?

Yes. Zucchini and courgette are two names for the same vegetable, so you can use either depending on where you live.

Recommended Kitchen Tools

A few simple kitchen tools can make preparing this easy zucchini casserole even quicker. Here are some of the kitchen essentials I use or recommend for recipes like this:

• Casserole Dish – safe for use in the oven, perfect for a multitude of easy recipes.
• Box Grater – to easily create freshly grated cheese.
• Glass Meal Prep Containers – any leftovers are perfect stored in containers in the fridge to enjoy within a couple of days.
• Measuring Cups and Spoons – perfectly measure out the ingredients for the simple recipe.

Updated in August 2026 with additional recipe tips, FAQs and improved instructions.

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