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

The Best Squash Casserole

  • Author: Debi ~ QuicheMyGrits
  • Prep Time: 15 minutes
  • Cook Time: 30 minutes
  • Total Time: 45 minutes
  • Yield: 8 1x
  • Diet: Vegetarian


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. A true southern delight!




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


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


  • 1/4 stick butter, melted
  • 1 sleeve Ritz crackers, crushed
  • 1/2 cup french fried onions, crushed


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


Squash casserole pairs well with fried chicken, pork tenderloin and glazed ham

Use two cheeses for best results. Make sure one of them is parmesan.

  • Category: Side Dishes
  • Method: Skillet, Oven
  • Cuisine: Casserole

Keywords: squash casserole, best squash casserole, side dishes