Zucchini Gratin Recipe Zucchini Casserole

Cheesy Zucchini Gratin has layers of creamy, cheesy sauce and is topped with a crunchy buttery topping. Ooey-gooey and cheesy, this low-carb take-on comfort food will please any crowd! This recipe is a twist on classic scalloped potatoes. Gratins are so rich and indulgent, they make any meal a joy to serve and eat. Try creamy cauliflower, brussels sprouts, or potato and mushroom gratins for a more mouthwatering flavor you will LOVE!

Zucchini Casserole Recipe

If you want a side dish to impress this is it! Not only is Zucchini tasty, but it’s also good for you too! It’s low in calories, keto-friendly, and packed with antioxidants, potassium, and vitamins B and C. For those times when you really want comfort food but don’t want to overload in calories, this is the dish for you. Zucchini gratin is just as satisfying and filling as a potato dish with half the carbs! The other great thing about this recipe is that it is extremely easy to throw together. It utilizes so many simple ingredients that you may not even need to go shop for any! I know your family is going to go crazy over this quick and easy dish. As a side, it pairs so well with a variety of dishes, but honestly, this zucchini gratin is so good, you may want to just eat it alone!

Zucchini Gratin Ingredients

These pantry staples come together to create the most hearty, cheesy goodness! Zucchini gratin is the perfect combination and the best side dish at the table this summertime. For complete recipe details, see the recipe card below.

Zucchini: You will need 6 small zucchinis, sliced. You can also grate your zucchini instead for a more noodle-like texture. Mozzarella Cheese: The stretchy, melty texture of Mozzarella is perfect for gratins. Parmesan Cheese: Parmesan adds a great flavor and nuttiness. Cheddar Cheese: Cheddar is always a favorite for sharp flavor and color. Gruyere Cheese: This third cheese in the mix really takes this recipe over the top. It adds in a delicious flavor that blends well with the other cheese. Heavy Whipping Cream: Adds moisture and thickness to your creamy sauce. Flour: For use as a thickening agent. All-purpose flour works great! Butter: Adds a rich flavor to your gratin. Everything is better with butter! Salt: Add more or less to taste. Garlic Powder: For a perfect savory flavor! Trust me, you want garlic in this.

Making Three Cheese Zucchini Gratin

In just 4 easy steps, you will have a delicious dinner that the whole family will love! This zucchini gratin recipe only takes 15 minutes of prep time and then it’s hands-off!

Using Different Cheeses: You can definitely mix up the cheeses to your liking or to work with what you’re serving. From cream cheese, feta, to pepper jack you can get creative with it. Cheese adds more creaminess to your zucchini gratin sauce. Cream: You can use half and half if you want to reduce the fat of your gratin. Cut Zucchini Evenly: Slice your zucchini evenly so that it cooks at the same rate. You can use yellow zucchini here as well or a mixture of both. Spices: Add in different spices for extra zing. Make it Italian with basil and oregano. For a Mexican take, use cumin, chili powder, and paprika. Toppings: For a fun twist, try French fried onions on top! I also recommend sprinkling homemade Italian seasoning on top for an extra pop of flavor. Zucchini Too Watery: Zucchini naturally has a very high water content, so there are a couple tricks I use to make sure your gratin doesn’t become too watery. The first is to sprinkle your freshly cut zucchini with salt and let it sit in a strainer. The salt will work to pull the water out. You can also sauté your zucchini before layering to reduce its moisture.

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All nutritional information is based on third party calculations and is only an estimate. Each recipe and nutritional value will vary depending on the brands you use, measuring methods and portion sizes per household.