Cheesy Zucchini and Squash Casserole Recipe
This cheesy zucchini and squash casserole is a simple, flavorful dish made with fresh summer vegetables, creamy cheese, and a crispy golden topping. Perfect as a comforting side for weeknight dinners, potlucks, or holiday gatherings.
Ingredients
- 3 medium zucchini (about 2 pounds), sliced into ¼-inch rounds
- 3 medium yellow squash (about 2 pounds), sliced into ¼-inch rounds
- 1 large sweet onion thinly sliced (Vidalia preferred)
- 2 cups sharp cheddar cheese, freshly grated
- 1 cup our cream, room temperature
- ½ cup mayonnaise (substitute Greek yogurt for lighter option)
- 2 large eggs, beaten
- 1 cup panko breadcrumbs
- ¼ cup fresh chives, chopped
- 2 cloves garlic, minced
- 1 teaspoon salt
- ½ teaspoon black pepper
- ¼ teaspoon paprika
- 2 tablespoons butter, melted
Instructions
- Step 1: Prepare the VegetablesPreheat your oven to 350°F (175°C). Slice zucchini and yellow squash into uniform ¼-inch rounds using a mandoline or sharp knife. Place sliced vegetables in a large colander, sprinkle with 1 teaspoon salt, and toss thoroughly.Allow vegetables to drain for 15 minutes. This crucial step removes excess moisture, preventing a watery casserole. Pat vegetables dry with paper towels before proceeding.
- Step 2: Create the Cheese MixtureIn a large mixing bowl, combine sour cream, mayonnaise, beaten eggs, minced garlic, and chopped chives. Whisk until smooth and well incorporated. Add 1½ cups of grated cheddar cheese, reserving ½ cup for topping.Season the mixture with black pepper and paprika. Taste and adjust seasoning as needed, remembering that the vegetables were already salted.
- Step 3: Combine Vegetables and SauceAdd the drained zucchini, squash, and sliced onions to the cheese mixture. Gently fold ingredients together until vegetables are evenly coated. Avoid overmixing to prevent breaking the vegetable slices.
- Step 4: Assemble the CasseroleGrease a 9x13-inch baking dish with butter or cooking spray. Transfer the vegetable mixture to the prepared dish, spreading evenly. The mixture should fill the dish about ¾ full.in a small bowl, combine panko breadcrumbs with melted butter and remaining ½ cup cheddar cheese. Sprinkle this mixture evenly over the casserole surface.
- Step 5: Bake to PerfectionBake uncovered for 35-40 minutes, until the top is golden brown and the center is set. The casserole should not jiggle when gently shaken. If the top browns too quickly, cover loosely with aluminum foil.Allow the casserole to rest for 10 minutes before serving. This resting period helps the dish set properly and makes serving easier.