Introduction

This squash casserole is a simple, comforting dish that highlights the fresh flavors of yellow squash and zucchini. With a crispy breadcrumb topping and a blend of cheeses, it makes a perfect side for any meal.

Ingredients

1 small onion (sliced)
1 tablespoon butter
1 tablespoon olive oil
½ teaspoon Italian seasoning
2 pounds squash (yellow squash and zucchini)
Salt and pepper to taste
⅓ cup seasoned bread crumbs
¼ cup grated Parmesan cheese
¼ cup shredded cheddar cheese
2 tablespoons melted butter

Instructions

Step 1: Preheat the oven to 350°F.
Step 2: Slice the squash and zucchini into ¼-inch slices.
Step 3: In a large skillet over medium heat, cook the sliced onion in butter and olive oil until tender. Increase heat to medium-high, then add the squash, Italian seasoning, salt, and pepper. Cook for 5 to 6 minutes until the squash is tender-crisp.
Step 4: Grease a 2-quart baking dish. Arrange the squash and onions in the dish so that the squash slices stand on their sides.
Step 5: In a small bowl, combine the breadcrumbs, Parmesan cheese, cheddar cheese, and melted butter. Sprinkle this mixture evenly over the squash.
Step 6: Bake for 35 to 40 minutes, or until the squash is tender and the topping is golden brown.

Tips & Variations

Use fresh squash for the best flavor and texture. If you prefer a softer casserole, cook the squash a little longer before baking.
For extra flavor, add a pinch of garlic powder or smoked paprika to the breadcrumb mixture.
Try mixing in a handful of cooked bacon bits for a smoky twist.

Storage

Store leftover casserole in an airtight container in the refrigerator for up to 3 days. Reheat gently in the oven or microwave until warmed through.

How to Serve

Serve this delicious recipe with your favorite sides.

FAQs

Can I use only zucchini or only yellow squash?

Yes, you can use either zucchini or yellow squash alone if you prefer, but the combination provides a nice balance of flavors and colors.

Can I prepare this casserole ahead of time?

Yes, assemble the casserole and refrigerate it covered for up to 24 hours before baking. Add a few extra minutes to the baking time if baking from cold.

Squash Casserole Recipe

Print Recipe

★★★★★

4.7 from 67 reviews

This Squash Casserole is a comforting and flavorful side dish featuring tender yellow squash and zucchini cooked with onions and Italian seasoning, topped with a savory blend of seasoned breadcrumbs, Parmesan, and cheddar cheese. Baked to perfection, it’s an easy and delicious way to enjoy fresh summer squash.

Author: Dylan
Prep Time: 15 minutes
Cook Time: 40 minutes
Total Time: 55 minutes
Yield: 6 servings 1x
Category: Side Dish
Method: Baking
Cuisine: American
Diet: Vegetarian

Ingredients

Scale

Vegetables

1 small onion, sliced
2 pounds squash (yellow squash and zucchini), sliced into ¼-inch slices

For Cooking

1 tablespoon butter
1 tablespoon olive oil
½ teaspoon Italian seasoning
Salt and pepper to taste

Topping

⅓ cup seasoned bread crumbs
¼ cup grated Parmesan cheese
¼ cup shredded cheddar cheese
2 tablespoons melted butter

Instructions

Preheat oven: Preheat your oven to 350°F (175°C) to ensure it reaches the right temperature for baking the casserole evenly.
Prepare squash: Slice the yellow squash and zucchini into ¼-inch thick slices to allow them to cook evenly and maintain a tender texture.
Sauté onions and squash: In a large skillet, heat 1 tablespoon of butter and 1 tablespoon of olive oil over medium heat. Add the sliced onion and cook until tender. Increase heat to medium-high, then add the sliced squash along with Italian seasoning, salt, and pepper. Cook for 5 to 6 minutes, stirring occasionally, until the squash is just tender-crisp.
Arrange in baking dish: Grease a 2-quart baking dish. Arrange the cooked squash and onions in the dish with the squash standing on its side to create an attractive layered presentation.
Prepare topping: In a small bowl, mix together the seasoned bread crumbs, grated Parmesan cheese, shredded cheddar cheese, and melted butter until well combined.
Apply topping and bake: Sprinkle the breadcrumb and cheese mixture evenly over the arranged squash and onion. Bake in the preheated oven for 35 to 40 minutes, or until the squash is tender and the topping is golden brown and crispy.

Notes

You can use all yellow squash, all zucchini, or a mix depending on your preference.
For a crunchier topping, add more bread crumbs or a handful of crushed crackers.
To make it vegetarian, ensure the cheese and butter used are free from animal rennet and are suitable for vegetarians.
This casserole pairs well with grilled meats or as a hearty vegetarian main dish.
Leftovers can be refrigerated for up to 3 days and reheated in the oven to retain crispness.

Keywords: squash casserole, yellow squash recipe, zucchini casserole, baked squash, vegetable side dish, cheesy squash bake