The Best Squash Casserole

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Look no further, because this is truly The Best Squash Casserole recipe you’ll ever taste. It has everything you love without the added preservatives, and the flavor is amazing!

squash casserole being scooped out of a white dish
The Best Squash Casserole
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Why This Recipe is Best

Southern Squash Casserole is a classic dish that has been around a long time. Most folks like to use cream of mushroom soup to make it, but I promise you’ll love this new version that has no MSG or artificial ingredients!

The addition of sour cream, along with mayonnaise and eggs, creates a custard consistency that is made even better by including two cheeses.

I know you’ve been making this dish for years, but y’all…this recipe is worth a second look. Folks tell me they’ll never go back to the old way of making it after trying this version!

squash casserole after it has been served with crumbs in a plate.

Ingredients

This recipe is so easy to put together, it will be ready to pop in the oven in just 15 minutes!

Squash

  • butter
  • yellow squash, quartered and diced
  • sweet onion, diced
  • garlic salt

Filling

  • sour cream
  • mayonnaise
  • sharp cheddar cheese, shredded
  • parmesan cheese, shredded
  • eggs

Topping

  • butter, melted
  • Ritz crackers, crushed
  • french fried onions, crushed
ingredients needed to make squash casserole.
Ingredients Needed For Squash Casserole

Instructions

Add squash, onion, and garlic salt to a skillet. Saute’ for 10 minutes over medium heat until tender. Take off heat.

Fold in sour cream, mayonnaise, cheddar and parmesan to the skillet. Stir well. Beat eggs and mix well with filling. Pour contents into a 13 X 9 inch casserole dish.

In a separate bowl, melt butter in microwave. Crush crackers and french fried onions in a large baggie, then mix with melted butter in bowl.

Sprinkle cracker mixture over squash casserole. Bake for 30 minutes until topping is golden brown and filling is bubbly.

Recipe FAQS

What type of squash works best in a casserole?

Yellow squash is the best squash to use in a casserole because the seeds are tender and do not have to be removed. You can also eat the skin, which makes yellow squash a great choice for this recipe.

What meat goes with squash casserole?

Any type of meat tastes great alongside this dish. Try pork tenderloin, glazed ham, pot roast, and fried chicken to name a few!

Can squash casserole be frozen?

It sure can! Just make sure you freeze squash casserole after it’s been cooked. It freezes well for up to 3 months in an airtight container.

close up photo of squash casserole.

Expert Tips

  • Sautéing onions and squash in butter gives this dish its robust flavor.
  • Adding a dash of garlic salt to the squash while sautéing adds depth.
  • Use two cheeses for best results. Make sure one of them is parmesan.
  • Feel free to substitute zucchini for squash if you wish, but the flavor will change.

More Casseroles to Love

Casseroles are a southern way of life! Check out these other amazing dishes that go well with just about anything!

Recipe Card

a spoon being lifted up over a squash casserole showing ingredients.

The Best Squash Casserole

Creamy squash casserole has to be one of the best comfort foods ever!  It's filled with sautéed squash, onions, parmesan, cheddar, sour cream and a little mayo.
5 from 6 votes
Print Pin Rate
Course: Side Dishes
Cuisine: Casserole
Prep Time: 15 minutes
Cook Time: 30 minutes
Total Time: 45 minutes
Servings: 8
Calories: 397kcal

*See notes in blog post for detailed tips, photos and instructions.

Ingredients

SQUASH

  • 2 Tbsp. butter
  • 3 large yellow squash quartered and diced
  • 1 small sweet onion diced
  • ½ teaspoon garlic salt with parsley

FILLING

  • 1 cup sour cream
  • ½ cup mayonnaise I use Duke's
  • 8 oz. pkg. sharp cheddar cheese shredded
  • 1 cup parmesan cheese shredded
  • 2 eggs beaten

TOPPING

  • ¼ stick butter melted
  • 1 sleeve Ritz crackers crushed
  • ½ cup french fried onions crushed

Instructions

  • Preheat oven to 350 degrees.
  • Melt butter in skillet.  Add squash, onion, and garlic salt.
  • Saute' for 10 minutes over medium heat until tender.  Take off heat.
  • Add sour cream, mayonnaise, cheddar and parmesan to the skillet. Stir well. 
  • Beat 2 eggs and mix well with filling. 
  • Pour contents of skillet into a large casserole dish.
  • In a separate bowl, melt butter in microwave.
  • Crush crackers and french fried onions in a large baggie and mix with melted butter in bowl.
  • Sprinkle cracker mixture over squash casserole.
  • Bake for 30 minutes until topping is golden brown.

Notes

Nutrition

Calories: 397kcal | Carbohydrates: 7g | Protein: 15g | Fat: 35g | Saturated Fat: 16g | Sodium: 710mg | Potassium: 312mg | Fiber: 1g | Sugar: 4g | Vitamin C: 14mg | Calcium: 407mg | Iron: 1mg

Nutrition info is an auto generated estimate.

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29 Comments

  1. I would love to make for Easter, hope someone will help me. Ritz crackers are not sold in a sleeve in Canada, how many crackers will I need? Please and Thank you. Happy Easter 2022 to everyone. So nice to see our friends again.

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