Side Dishes
Yellow Squash Casserole
Yellow Squash Casserole is creamy and cheesy with a buttery and crispy Ritz cracker topping. It makes a delicious side
- Serves 6 servings
- Prep 15 minutes
- Cook 30 minutes
- Total 45 minutes

Yellow Squash Casserole with lots of cheddar cheese and a buttery cracker crumb topping is one of my favorite casseroles to make during the summer months. It’s super creamy with tender slices of summer squash and onion. A combination of mayonnaise and sour cream gives it plenty of creamy flavor.
I love a squash casserole so much, I make multiple versions. While this one is my go to, I also love Pimento Cheese Squash Casserole, Squash Casserole with Stuffing Top, andSquash, Zucchini, and Corn Casserole.
How To Serve
Serve Yellow Squash Casserole at a summer potluck or as a comforting side dish for a family meal. I love it with fried chicken. Actually, I think I love everything with fried chicken. 🙂
This recipe also makes a great holiday side. My som requests it every Thanksgiving and Christmas.
Yellow squash is plentiful at farmers markets in the south during the summer months and it is easily grown in a home garden so I tend to make this casserole frequently during the summer months. But a creamy casserole like this is also extremely comforting during the cooler months.

How To Serve
(More detailed instructions and video in recipe card below.)
- Steam the squash and onion until tender. Season with salt and pepper.

- Mix together egg, mayonnaise, sour cream, and milk.

- Stir in cheese, squash, and onion. Transfer to baking dish.

- Scatter crushed crackers on top and drizzle with melted butter.

- Bake for 30 minutes.
Yellow Squash Casserole Recipe Tip
This casserole is really easy to make. You do want to precook the squash some because you don’t want it to be crunchy at all in the finished casserole. You can either slice it and sauté it, steam it, or even microwave it until just tender.
★★★★★
What readers are saying
This is so easy to make! The taste will take back to grandma’s with family all around eating, laughing and good food.
Make Ahead and Storage Suggestions
This recipe can be prepared through Step 5 a day in advance and refrigerated. Leftovers can be stored in an airtight container in the refrigerator for 4 days.

More Southern Casseroles
- Southern Broccoli Casserole– with a buttery cracker crumb topping.
- Old-Fashioned Cabbage Casserole– people rave about this recipe.
- Pineapple Casserole– a unique blend of sweet and savory.
- Lima Bean Casserole– Creamy and cheesy.
- Crock Pot Sweet Potato Casserole
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Originally posted May 28, 2016.
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Recipe
Yellow Squash Casserole
Squash Casserole is creamy and cheesy with a buttery Ritz cracker topping.
- Serves 6 servings
- Prep 15 minutes
- Cook 30 minutes
- Total 45 minutes
Ingredients
- 4 medium yellow squash (ends trimmed and cut into 1/4-inch slices)
- 1 medium onion (sliced)
- salt and pepper
- 1 egg (lightly beaten)
- 1/4 cup mayonnaise
- 1/3 cup sour cream
- 1/4 cup milk
- 1 cup heaping shredded cheddar cheese
- 24 Ritz crackers
- 2 tablespoons butter (melted)
Instructions
- 1
Preheat oven to 350 degrees and lightly grease a casserole dish.
- 2
Steam squash and onion until just tender, about 5 to 7 minutes.
- 3
Season squash and onion with salt and pepper.
- 4
In a large bowl, whisk together egg, mayonnaise, sour cream, and milk.
- 5
Stir in cheese, squash and onion. Transfer mixture to casserole dish.
- 6
Crush crackers and scatter on top of squash. Drizzle with melted butter.
- 7
Bake for 30 minutes.
Nutrition
- Calories303 kcal
- Carbohydrates15 g
- Protein9 g
- Fat24 g
- Saturated Fat10 g
- Polyunsaturated Fat6 g
- Monounsaturated Fat6 g
- Trans Fat0.3 g
- Cholesterol69 mg
- Sodium340 mg
- Potassium442 mg
- Fiber2 g
- Sugar6 g
- Vitamin A709 IU
- Vitamin C24 mg
- Calcium207 mg
- Iron1 mg







