Cheesy Scalloped Zucchini

If you’re looking for a delicious, comforting side dish that’s packed with cheesy goodness, this Cheesy Scalloped Zucchini recipe is the perfect choice. Thin slices of fresh zucchini are layered with a rich homemade cheese sauce and baked until golden, bubbly, and perfectly tender. This easy casserole is an excellent way to use fresh zucchini during the summer months, but it’s delicious enough to enjoy all year round. Whether you’re serving it with grilled chicken, roasted beef, or as a vegetarian main course, this cheesy zucchini bake is guaranteed to become a family favorite.

Why You’ll Love This Recipe

Rich, creamy, and full of cheesy flavor.
A great way to use fresh garden zucchini.
Easy to prepare with simple pantry ingredients.
Perfect for holidays, potlucks, and weeknight dinners.
Can be made ahead of time and reheated.

Preparation Time

Prep Time: 20 minutes
Cook Time: 45 minutes
Total Time: 1 hour 5 minutes
Servings: 6 servings

Ingredients

4 medium zucchini, thinly sliced
2 tablespoons butter
1 small onion, finely diced
2 garlic cloves, minced
2 tablespoons all-purpose flour
2 cups whole milk
½ cup heavy cream (optional for extra richness)
2 cups shredded sharp cheddar cheese
½ cup grated Parmesan cheese
1 teaspoon salt
½ teaspoon black pepper
½ teaspoon paprika
½ teaspoon dried thyme
1 cup breadcrumbs (optional)
1 tablespoon chopped fresh parsley, for garnish

Instructions

Step 1: Prepare the Zucchini

Preheat your oven to 375°F (190°C). Wash the zucchini thoroughly and slice it into thin, even rounds about ¼ inch thick. Sprinkle the slices lightly with salt and let them sit for 10 minutes to draw out excess moisture. Pat them dry using paper towels before assembling the casserole.

Step 2: Make the Cheese Sauce

In a large saucepan, melt the butter over medium heat. Add the diced onion and cook for about 4–5 minutes until softened. Stir in the minced garlic and cook for another minute until fragrant.

Sprinkle the flour over the onions and stir continuously for one minute to cook out the raw flour taste. Slowly pour in the milk while whisking constantly until the mixture becomes smooth. Add the heavy cream if using, then continue stirring until the sauce begins to thicken.

Reduce the heat to low and gradually stir in the cheddar cheese and half of the Parmesan cheese. Mix until the cheese has completely melted and the sauce is smooth and creamy. Season with salt, black pepper, paprika, and dried thyme.

Step 3: Assemble the Casserole

Lightly grease a 9×13-inch baking dish with butter or cooking spray.

Arrange one layer of zucchini slices on the bottom of the dish. Spoon some of the cheese sauce evenly over the zucchini. Continue layering the zucchini and cheese sauce until all of the ingredients have been used.

Sprinkle the remaining Parmesan cheese over the top. If you enjoy a crispy topping, evenly spread the breadcrumbs over the casserole.

Step 4: Bake

Bake uncovered for 40–45 minutes, or until the zucchini is tender and the top is golden brown and bubbling around the edges.

If you’d like an extra crispy top, broil the casserole for the final 2–3 minutes, watching carefully to prevent burning.

Remove the casserole from the oven and allow it to rest for 10 minutes before serving. This helps the cheese sauce set and makes serving much easier.

Recipe Tips

Slice the zucchini evenly so it cooks at the same rate.
Pat the zucchini dry to prevent a watery casserole.
Mix different cheeses like mozzarella, Gruyère, Monterey Jack, or Gouda for extra flavor.
Add cooked bacon, diced ham, or shredded chicken for a heartier meal.
Fresh herbs such as basil, parsley, or chives make a wonderful finishing touch.

Storage Instructions

Store leftover Cheesy Scalloped Zucchini in an airtight container in the refrigerator for up to 4 days. Reheat in a 350°F (175°C) oven for about 15 minutes or microwave individual portions until heated through.

You can also freeze the casserole for up to 2 months. Thaw overnight in the refrigerator before reheating.

Serving Suggestions

This cheesy zucchini casserole pairs perfectly with grilled steak, roasted chicken, baked salmon, pork chops, or holiday turkey. It also works wonderfully as a vegetarian main course served alongside a crisp green salad and warm garlic bread.

Frequently Asked Questions

Can I make this recipe ahead of time?

Yes. Assemble the casserole up to 24 hours in advance, cover it tightly, and refrigerate. Bake just before serving.

Can I use yellow squash?

Absolutely. Yellow summer squash works just as well and adds beautiful color to the dish.

What is the best cheese to use?

Sharp cheddar provides the richest flavor, while Parmesan adds a delicious savory finish. Combining multiple cheeses creates an even creamier texture.

How do I keep the casserole from becoming watery?

Salting the zucchini before baking and patting it dry removes excess moisture, helping the casserole stay thick and creamy.

Nutrition Information (Per Serving)

Calories: 285
Protein: 14g
Carbohydrates: 12g
Fat: 21g
Saturated Fat: 11g
Fiber: 2g
Sugar: 5g
Sodium: 540mg

Final Thoughts

Cheesy Scalloped Zucchini is the ultimate comfort food for anyone who loves creamy casseroles and fresh vegetables. With layers of tender zucchini, a homemade cheese sauce, and a perfectly golden topping, this recipe is simple enough for a weeknight dinner yet elegant enough for family gatherings and holiday meals. Once you try this easy baked zucchini casserole, it’s sure to earn a permanent place in your favorite recipe collection.