Name: Zucchini and Yellow Squash Au Gratin
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: American
Ingredients: 2 medium zucchinis, sliced into rounds; 2 medium yellow squash, sliced into rounds; 2 tablespoons butter; 2 tablespoons all-purpose flour; 1 cup milk; 1 cup shredded cheddar cheese; 1/4 cup grated Parmesan cheese; Salt and pepper to taste; 1/4 cup breadcrumbs (optional); Fresh parsley, chopped, for garnish

Why You’ll Love Zucchini and Yellow Squash Au Gratin Recipe

This dish is a crowd-pleaser for both veggie lovers and picky eaters alike. It’s creamy, cheesy, and full of flavor, yet incredibly easy to prepare. Whether you’re serving it as a side dish at a holiday meal or looking for a cozy weeknight veggie bake, this gratin fits right in. Plus, the optional breadcrumbs on top add a satisfying crunch.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

2 medium zucchinis, sliced into rounds
2 medium yellow squash, sliced into rounds
2 tablespoons butter
2 tablespoons all-purpose flour
1 cup milk
1 cup shredded cheddar cheese
1/4 cup grated Parmesan cheese
Salt and pepper to taste
1/4 cup breadcrumbs (optional)
Fresh parsley, chopped, for garnish

Directions

Preheat the oven to 375°F (190°C). Grease a baking dish with butter or cooking spray.
In a large skillet, melt the butter over medium heat. Add the flour and cook, stirring constantly, for 1-2 minutes to form a roux.
Gradually whisk in the milk until smooth and thickened.
Stir in the cheddar cheese and Parmesan cheese until melted and smooth. Season with salt and pepper to taste.
Add the sliced zucchini and yellow squash to the cheese sauce, tossing to coat evenly.
Transfer the mixture to the prepared baking dish and spread it out evenly.
Sprinkle breadcrumbs over the top if using.
Bake for 25-30 minutes, or until the vegetables are tender and the top is golden brown and bubbly.
Garnish with chopped parsley before serving.

Servings and timing

This recipe serves 6 people.
Preparation time: 15 minutes
Cooking time: 30 minutes
Total time: 45 minutes

Variations

Add protein: Mix in cooked shredded chicken or crumbled sausage for a heartier dish.
Different cheeses: Try using Gruyère, mozzarella, or Monterey Jack for a twist on the flavor.
Low-carb option: Skip the flour and breadcrumbs and thicken the sauce with a bit of cream cheese instead.
Spicy kick: Add a pinch of cayenne pepper or diced jalapeños to the cheese sauce.
Herb twist: Mix in fresh thyme or basil for extra aromatic flavor.

Storage/Reheating

Store any leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, bake at 350°F (175°C) for about 10-15 minutes, or until heated through. You can also microwave individual portions, but the topping may lose some crispiness.

FAQs

What’s the difference between zucchini and yellow squash?

Zucchini is typically green and straight, while yellow squash is often yellow with a slightly curved neck. Both have a mild flavor and similar texture, making them great companions in recipes.

Can I make this recipe ahead of time?

Yes, you can assemble the gratin a day in advance and refrigerate it. Bake it just before serving.

Do I have to use both types of squash?

No, you can use only zucchini or only yellow squash if that’s what you have on hand.

Can I freeze this dish?

It’s best enjoyed fresh, but you can freeze it. Just note that the texture of the squash may become softer upon reheating.

What can I use instead of breadcrumbs?

Crushed crackers, crushed cornflakes, or even grated Parmesan can add a similar crunch on top.

Can I make this gluten-free?

Yes, use a gluten-free flour blend in the roux and gluten-free breadcrumbs or omit them altogether.

How can I make this dish lighter?

Use low-fat milk and reduce the cheese slightly to cut down on calories and fat.

Is this dish vegetarian?

Yes, as long as the cheeses used are vegetarian-friendly (check labels for rennet-free cheese).

Can I cook this on the stovetop only?

You can prepare everything on the stove and skip baking, but you’ll miss out on the golden baked topping.

What kind of milk should I use?

Whole milk provides the creamiest sauce, but 2% or even unsweetened plant-based milk can work in a pinch.

Conclusion

Zucchini and Yellow Squash Au Gratin is a simple yet elegant way to enjoy seasonal vegetables. With its creamy cheese sauce and optional crispy topping, it’s a dish that brings warmth and comfort to any meal. Whether you’re cooking for a family dinner or hosting guests, this gratin is sure to impress.