Summer Squash Casserole. This squash and zucchini casserole is the perfect side dish for any season or meal, from summer BBQ to Thanksgiving or Christmas dinner.
This creamy and cheesy summer squash casserole is made from fresh ingredients and without canned soup or egg. It's one of my favorite ways to serve summer squash for a crowd-pleasing side dish.
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Why You'll Love this Summer Squash Casserole
- Flavorful: This squash and zucchini casserole is rich in flavor and is year-round comfort food.
- Great texture: The squash is so tender but not mushy.
- Perfect consistency: The sauce is cheesy and creamy but not too heavy.
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Casserole Ingredients:
To make this summer squash casserole, you will need the following ingredients:
- Yellow Squash
- Zucchini
- Heavy Cream
- Panko Bread Crumb
- Onion
- Butter
- Shallots
- Italian Seasoning
- Garlic
- Sharp Cheddar Cheese
- Parmesan Cheese
- Salt and Pepper
What To Serve With:
- OVEN-BAKED CHICKEN BREAST (SO TENDER AND JUICY!)
- LEMON PEPPER CHICKEN THIGHS
- GRILLED CHICKEN BREAST
- ROASTED HALF CHICKEN
- CHINESE ROASTED CHICKEN WITH A 3-INGREDIENT SPICE RUB)
- EASY ZA’ATAR ROASTED CHICKEN BREAST
- CRISPY GRILLED CHICKEN WINGS
- HEALTHY BAKED CHICKEN TENDERS (AKA CHICKEN STRIPS)
- DRY RUB CHICKEN WINGS (OVEN-BAKED/INSTANT POT/NINJA FOODI)
- INSTANT POT GARLIC PARMESAN CHICKEN WINGS (NINJA FOODI + OVEN-BAKED INSTRUCTIONS)
How to Make Squash Casserole
To cook this casserole it will take less than 20 minutes.
- First, you need to cook some of the ingredients in a skillet for about 6 minutes.
- Secondly, you need to bake the casserole in the oven for 8 minutes.
The Best Cheeses to Use
This recipe is very customizable. I listed sharp cheddar cheese and parmesan cheese as the ingredients. I think both kinds of cheeses really compliment each other. If paired together, you will have a bold, rich cheese flavor in the dish.
Best Breadcrumbs for Casserole
I also opted in for panko breadcrumbs because it has a crisper, airier texture than most types of bread crumbs on the market. I purchased the panko breadcrumbs from a local Trader's Joe market.
Alternative Ingredients
You may use mild cheddar cheese in the replacement of sharp cheddar cheese.
Also, for a lighter sauce version, you can skip the cheddar cheese and use only Parmesan cheese instead (just use the same amount as the recipe calls for, no need to increase it).
Pecorino Romano is a good substitute for Parmesan. Just be sure to use one-third less than the recipe calls to keep the sodium level and flavor in line.
How to Store Zucchini and Squash Casserole
To store fresh squash in the fridge, you need to keep the squash whole, dry and unwashed. Then store it in a plastic or paper bag with that has had a few holes poked in it for airflow, and place it in the vegetable crisper drawer. The squash should last up to two weeks.
Properly stored, cooked squash casserole will last for 3 to 5 days in the refrigerator. You can check out more info about cold food storage guide here.
Did you make this recipe? Be sure to leave a rating and a comment below! I'd appreciate it.
Summer Squash Casserole
Ingredients
- 2 cups diced yellow squash
- 2 cups diced zucchini
- 2 tbsp unsalted butter
- ½ cup chopped yellow onion
- 2 tbsp chopped shallots
- 1 tbsp minced garlic
- ½ tsp Italian seasoning
- ½ tsp salt
- ½ tsp black pepper
- ½ cup heavy cream
- ½ cup shredded cheddar cheese, (lightly packed)
- ½ cup parmesan cheese , (divided)
- ½ cup panko bread crumb, (use more according to your liking)
Instructions
- Preheat the oven to 450°F
- In a large skillet, melt butter over medium heat. Add onion and shallots, cook for about 10 seconds.
- Add chopped squash, Italian seasoning, salt, and pepper, cook and stir occasionally for about 3 minutes or until the yellow squash and zucchini are crisp-tender.
- Add garlic, cook for about 30 seconds.
- Add heavy cream, cook, until reduced for about 3 minutes. Remove from the heat.
- Stir in cheddar cheese, ¼ cup Parmesan cheese, and ¼ cup bread crumbs.
- Transfer the mixture into a 2-quart baking dish and sprinkle with ¼ cup bread crumbs and ¼ cup Parmesan cheese. Bake until golden brown for about 8 minutes.
Rena
This looks amazing! I love grilled squash but always want to use it in different ways. I can't wait to try this one.
Cait
Grilled squash is always a favorite of ours in the summer! I can’t wait to try and make this for my family!
Sarah Bailey
Now this sounds like an absolutely incredible casserole to put together for the summer. I definitely need to try and make it myself as it sounds like something that would really tickle my tastebuds.
Amber Myers
This looks really good! I enjoy squash, so I'll have to try this over the summer. Plus I love things with cheese!
Terri Steffes
I am so in love with summer squash. I got the first squash of the season and I am so eager to start harvesting more.
Heather
I love that this recipe uses Panko bread crumbs. That and cheese is always a winning combination.
Brandy
I must admit I don't normally go for summer squash, but this casserole really has me ready to try it again! I bet I would love your summer squash casserole.
Nancy L
This looks and sounds delicious! I have only made stir frys with squash, so I must give this a try! I can't have dairy products, so I might try almond milk thickened with a little cornstarch.
Ruth I.
Yum! This looks appetizing! I am happy that I have those ingredients on the list. I can make this anytime!
Winter White
My mouth is watering as we speak! I love this casserole idea and love that you use some of my fav ingredients (hello cheese hello breadcrumbs)
Rachel
This looks so good. I am always looking for ways to make veggies that are in season.
Tammy
One of my favorite things to make in the summertime is squash Casserole. So good and yummy!! Also one of my favorite things to grow in the garden.
Beth
This looks delicious! I love summer squash and zucchinis, especially when they are served together with cheese!
Joan
Made this tonight and I have to say it is the best recipe I have ever used to cook up my summer squash and zucchini. The family loved it!!! Thanks for sharing.
Rika Livingston
Hi Joan,
I am so glad that you enjoyed this recipe! Your comment made my day! Thank you!
Best,
Rika
Becky
Made this for July 4th and it was fantastic; we used zucchini and squash from our garden! Thank you so much!
Rika
Hi Becky,
You're welcome and thanks for taking the time to share your feedback. I am sure the fresh zucchini and squash from your garden made this recipe taste even better.
Thanks,
Rika