Yellow Squash Casserole

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Hot and cheesy squash casserole makes for the best holiday side dish! You’ll love this creamy vegetable casserole with a crunchy buttery topping.

Similar to our cheesy zucchini casserole, but made with yellow squash, this recipe is a great addition to your holiday side dishes. It’s one of our new favorite casserole recipes to make during the holidays!

squash casserole being scooped with a serving spoon

Cheesy Easy Squash Casserole

Have you ever made a squash casserole? If not, now is your chance!

I promise it’s a hit with anyone who tries it. It’s super simple to make, cheesy, buttery, creamy, and crunchy. Add this to your holiday menu and you will not be disappointed. Everyone around the table will love it.

If you love squash, then you will definitely enjoy this dish. It’s packed with thinly sliced yellow squash, creamy cheeses, and a crunchy cracker topping. Something for everyone in this recipe!

It goes great alongside all of your other holiday dishes- turkey, rolls, pie, etc.! It’s also a great recipe to make ahead of time or the day of.

photo of how to make squash casserole

how to make squash casserole

Yellow squash tastes amazing in casserole form. It cooks evenly and perfectly every time, and pairs great with the cheeses.

PREP & COOK SQUASH. Thinly slice the yellow squash in half pieces. After you’ve prepped the squash, preheat the oven to 350 degrees. Add the oil to a large skillet over medium heat. Add the squash and the butter. Cook them until the squash is soft- about 7-8 minutes.

ADD CHEESE. After the squash is soft, pour it into a large bowl. Stir in the parmesan cheese, 1 cup of the cheddar cheese, sour cream, and the Italian seasoning. Add the garlic salt and pepper to taste.

Pour everything into a 9×13 greased baking pan. Sprinkle the remaining 1/2 cup of cheddar cheese on the top and set it aside while you prepare the ritz cracker topping.

ADD TOPPING. Add the crushed crackers into a gallon Ziploc bag. Add in the melted butter. Toss everything to coat the crackers. Spread it all evenly over the top of the casserole.

BAKE. Bake the casserole for 20 minutes or until golden and bubbly.

squash casserole with ritz crackers topping

squash casserole recipe Toppings + FAQ

The topping in this recipe is so tasty! It gives the dish that crunch that it needs.

Variations: You can add a little more cheese on top if you would like to make it extra cheesy. Feel free to add in other types of cheeses! You can also add in thinly sliced zucchini with the yellow squash for a little bit different flavor.

This is the perfect dish to make ahead of time to save precious cooking time on the day of Thanksgiving or another holiday meal. Make it a couple days ahead of time by preparing everything in the casserole dish. Keep it covered in the fridge. Prepare the topping separately and top it just before you’re ready to bake.

You can also freeze this dish until you’re ready to bake it.

Yellow squash casserole on a serving spoon

For more squash/zucchini recipes:

MORE COLLECTIONS: Side Dishes, Thanksgiving Side Dishes

Squash Casserole Recipe

5 from 10 votes
Course Main Course, Side Dish
Cuisine American
Prep Time 15 minutes
Cook Time 20 minutes
Total Time 35 minutes
Servings 6
Calories 276 kcal


  • 1 Tbsp vegetable oil
  • 4-5 medium yellow summer squash thinly sliced and halved
  • 1 Tbsp butter
  • 1/2 cup Parmesan cheese grated
  • 1 1/2 cup cheddar cheese shredded, divided
  • 1/2 cup sour cream
  • 1 tsp Italian seasoning
  • garlic salt
  • pepper
  • 2 Tbsp butter melted
  • 1 sleeve Ritz Crackers crushed medium to fine


  1. Preheat the oven to 350 degrees F

  2. Add the oil in a large skillet set to medium heat. Add the squash and butter. Cook until soft about 7-8 minutes

  3. Pour the squash into a large bowl. Stir in the Parmesan cheese, 1 cup of the cheddar cheese, sour cream, Italian seasoning. Add garlic salt and pepper to taste.

  4. Pour into a 9x13 greased baking pan. Sprinkle the remaining 1/2 c of cheddar cheese on top. Set aside.

  5. Add the crushed crackers into a gallon Ziploc bag add the melted butter. Toss to coat the crackers. Spread evenly over the top of the casserole. 

  6. Bake for 20 minutes or until golden and bubbly.


Kristyn Merkley

My name is Kristyn and I’m the mom of SIX stinkin’ cute kids and the wife to my smokin’ hot hubby, Lo. My mom’s maiden name is Luna, and I’m one of the many crafty “Lil’ Lunas” in the fam. On this site I like to share all things creative – from recipes to home decor to gifts and home decor ideas. Welcome!

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  1. 5 stars
    We had this last year & I didn’t know how much I would like it!! Love the cheese & crackers on top. They give it a nice flavor!

  2. 5 stars
    My husband is a big fan of Squash and would love to have it more often. he’d be delighted to see this on the dinner table.

  3. 5 stars
    i’m not suret here is a more flavorful easy to make dish than this? I just love that this is vegetarian and the crackers on top just take it to another level. Thanks for an awesome simple to make recipe!

  4. 5 stars
    I love squash and with the added topping it makes it extra special. Adds a nice little crunCh to an already good casserole dish.

  5. 5 stars
    I lIke how the base of this casserole can easily be seasoned to yOur Preference. My husband liked it hotter with chili flakes while the rest of us liked it as it was written.