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Cheesy Summer Squash and Zucchini Casserole
Prep Time
20 mins
Cook Time
30 mins
Total Time
50 mins

Cheesy Summer Squash and Zucchini Casserole is a great use of all of the summer garden bounty. With a buttery, crunchy top, you can use yellow squash or zucchini or both to make this perfect side dish.

Course: Casserole
Cuisine: American
Keyword: cheesy squash casserole, cheesy summer squach and zucchini casserole, cheesy zucchini casserole, squash casserole
Servings: 8 -12 servings
Author: Barbara
  • 2 pounds 4-6 cups summer squash or zucchini (a combination can be used)
  • 1 Tablespoon onion flakes
  • 2 cups shredded cheddar cheese
  • 2 eggs slightly beaten
  • 1 1/2 cups crushed crackers
  • 1 stick melted butter
  1. Preheat oven to 400 degrees F.
  2. Wash and dice summer squash/zucchini. Boil in salted water until fork tender. Drain.
  3. Mix in onion flakes, cheese and eggs.
  4. Pour into a 13 x 9-inch pan that has been sprayed with nonstick cooking spray.
  5. Spread the crushed crackers over the casserole.
  6. Pour the melted butter over top the cracker crumbs.
  7. Bake for 30 minutes or until golden brown.
Recipe Notes
  • A zucchini is really just a type of squash, so you could really just call this a Cheesy Squash Casserole; however, it is nice to differentiate between the two vegetables.
  • This cheesy zucchini casserole uses a 2-step cooking process; first you boil the diced squash in salted water, and then you assemble the casserole and bake in the oven. 
  • You can use all zucchini or all squash in this baked squash casserole if you'd like or use a combination of the two.
  • The melted butter and cracker topping makes a delicious crunchy topping.  We use a similar concept in 4 Ingredient Broccoli Casserole. Kids go nuts for it!
  • We typically make this in the summer when we have squash coming out of our ears, but you can find squash all year long at the grocery store. 
  • If you are wondering how to store zucchini, then we have the answer.  Put the unwashed squash in a plastic bag in the refrigerator crisper drawer. The skin will most likely start to shrivel after 1 to 2 weeks.