This 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 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 zucchini au gratin recipe is that it’s 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 will be the best side dish at the table this summer. For measurements, see the recipe card below.
- Zucchini: You will need 6 small zucchinis, sliced. You can also grate your zucchini or use a mandoline slicer 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 creamy, delicious flavor that blends well with the other cheeses.
- Heavy Whipping Cream: Heavy cream adds smoisture and thickness to your creamy sauce.
- Flour: For use as a thickening agent. All-purpose flour works great!
- Unsalted Butter: Adds a rich flavor to your gratin. Everything is better with butter!
- Salt: Add more or less to taste.
- Garlic Powder: So your zucchini gratin has the perfect savory flavor! Trust me, you want garlic in this.
How to Make 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!
- Mix Together Sauce: In a small sauce pan melt 2 Tablespoons butter over medium heat and whisk in the flour, salt and pepper. Then add in the whipping cream and stir for about 2 minutes until it starts to thicken. Add ¼ cup parmesan cheese.
- Layer: Arrange half of the zucchini slices in the prepared baking dish overlapping each other. Then spread half of the sauce on top followed by ½ cup mozzarella cheese and ½ cup Gruyere cheese. Repeat with another layer of zucchini and sauce.
- Top with Cheese: Top with the remaining mozzarella cheese and parmesan cheese.
- Bake: Bake for 25 minutes or until the zucchini are fork tender and the top is starting to brown. Sprinkle with chives before serving.
Tips and Variations
Parmesan zucchini gratin is an easy, tasty dish that everyone will enjoy. Use these great tips and tricks to customize and enhance your dish!
- 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.
What to Serve With Zucchini Gratin
Parmesan zucchini gratin pairs perfectly with grilled meats and seafood. Try a roasted chicken or baked salmon for a super satisfying meal. This gratin is so good on its own, though, you could easily have this as your main dish served with a loaf of crusty bread and a side salad and you’ve got a delectable dinner on your hands!
Storing Leftovers
- In the Refrigerator: Keep in a sealed container for up to 3 days in the fridge.
- To Reheat: Cook in oven at 350 degrees Fahrenheit until warm.
- Make Ahead: You can mix this up and freeze for up to 2 months. Thaw overnight in the fridge and then bake as directed. You may need to add 5-10 minutes to make sure it cooks all the way through.
More Zucchini Recipes to Try
Three Cheese Zucchini Gratin
Ingredients
- 2 tablespoons butter
- 2 tablespoons all-purpose flour
- 1 teaspoon salt
- 1/2 teaspoon freshly ground black pepper
- 2 cups whipping cream (or half and half)
- 1/2 cup grated Parmesan cheese
- 1 cup shredded mozzarella cheese
- ½ cup Gruyere cheese
- 6 small zucchini sliced about ¼ inch thick
- Snipped fresh chives for garnish
Instructions
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Preheat oven to 400 degrees. Lightly spray a 2-quart casserole dish with cooking spray and set aside.
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In a small saucepan, melt 2 Tablespoons of butter over medium heat, and whisk in the flour, salt, and pepper. Add the whipping cream and stir for about 2 minutes until it thickens. Add ¼ cup parmesan cheese.
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Arrange half of the zucchini in the prepared casserole dish overlapping each other. Spread half of the sauce on top, followed by ½ cup mozzarella cheese and ½ cup Gruyere cheese. Repeat with another layer of zucchini and sauce.
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Top with the remaining mozzarella cheese and parmesan cheese.
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Bake for 25 minutes or until the zucchini is fork tender and the top starts to brown. Sprinkle with chives before serving.
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