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SIDES / Yellow Squash and Zucchini Casserole

Yellow Squash and Zucchini Casserole

July 11, 2026 by

A warm, golden casserole bubbling away in the oven fills the kitchen with a delightful aroma, making it impossible to resist. This Yellow Squash and Zucchini Casserole is a simple yet satisfying dish that takes only 30 minutes to prepare and bake, ensuring that you can enjoy a delicious family meal without spending the whole day in the kitchen. The combination of vibrant vegetables and gooey cheese creates a comforting side that pairs perfectly with any main dish.

This recipe is ideal for busy weeknights or weekend gatherings, delighting both vegetarians and cheese lovers alike. It can also be made ahead of time, allowing for an easy bake-and-serve option for potlucks or family events.

Why You’ll Love This Recipe

  • It features a creamy base with a crunchy topping that contrasts beautifully.
  • The vibrant colors make it as appealing to the eyes as it is to the palate.
  • It requires minimal prep time, letting you focus on other dishes.
  • Leftovers taste even better the next day, making it suitable for meal prep.

What You’ll Need

Gather the following ingredients for your casserole:

For the Vegetables

  • 2 medium zucchini, sliced
  • 2 medium yellow squash, sliced
  • 1/2 cup onion, diced

For the Cheese and Binder

  • 1 cup shredded cheddar cheese
  • 1/4 cup milk
  • 2 large eggs

For the Crunch

  • 1 cup breadcrumbs

For Greasing

  • Cooking spray or butter for greasing

Cheddar can be substituted with your favorite cheese.

Substitutions & Swaps

  • Use any type of cheese for a different flavor.
  • Replace milk with a plant-based alternative.
  • Zucchini can be swapped for eggplant.
  • Breadcrumbs can be substituted with crushed crackers.

How to Make It

Creating this casserole is a straightforward process with delicious results.

Preheat and Grease

Preheat oven to 350°F (175°C) and grease a casserole dish with cooking spray or butter.

Combine Ingredients

In a large bowl, combine sliced zucchini and yellow squash, diced onion, shredded cheddar cheese, breadcrumbs, milk, eggs, salt, and pepper; mix well.

Yellow Squash and Zucchini Casserole

Pour Mixture

Pour the mixture into the prepared casserole dish.

Bake

Bake in the preheated oven for 10-15 minutes, or until the top is golden and bubbly.

Cool and Serve

Let cool for a few minutes before serving.

How to Store It

Fridge: Store for up to 3 days in an airtight container.
Freezer: Yes, it freezes well.
Reheat: Microwave on medium for 3-4 minutes.

Tips for Best Results

  • Slice the vegetables evenly for uniform cooking.
  • Allow the casserole to cool slightly to enhance flavors.
  • Consider adding herbs for extra depth of flavor.
  • Don’t skip the breadcrumbs for that perfect crunchy topping.

Serving Suggestions

  • Serve alongside grilled chicken for a balanced meal.
  • Pair with a fresh garden salad for a lighter option.
  • Great for holiday gatherings or family get-togethers.

Yellow Squash and Zucchini Casserole

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