Yellow Squash Casserole

Indulge in the warm, comforting flavors of Yellow Squash Casserole, a side dish that promises to elevate any mealtime experience. This recipe combines tender yellow squash, sautéed onions, and a luscious cheesy, buttery cracker topping. Perfectly simple yet incredibly satisfying, it’s a dish that will have your family and guests asking for more.


To prepare this delightful casserole, you’ll need:

  • 4 cups yellow squash, sliced (about 2 squash)
  • 1 tablespoon olive oil
  • 1 yellow onion, diced
  • 2 cloves garlic, chopped
  • ¼ cup water
  • 1 sleeve of Ritz crackers
  • 1 cup cheddar cheese, heaping cup
  • 2 eggs, beaten
  • ¾ cup milk
  • ¼ cup butter, melted
  • 1 teaspoon salt
  • ½ teaspoon pepper
  • 2 tablespoons butter



  1. Preheat oven to 400 degrees Fahrenheit.
  2. Sautéing the Base:
    • In a large skillet, heat olive oil over medium heat. Add diced onions and chopped garlic, sautéing for 2-3 minutes until onions are translucent and aromatic.
    • Add sliced yellow squash to the skillet and pour in water. Cover and steam squash for 5 minutes until tender.
  3. Preparing the Topping:
    • In a medium bowl, crush Ritz crackers. Combine with a heaping cup of cheddar cheese. Reserve half of this mixture.
    • To the remaining cracker and cheese mixture, add beaten eggs, milk, melted butter, salt, and pepper. Mix thoroughly.
  4. Combining and Baking:
    • Stir cooked squash mixture into the cracker and cheese mixture until well combined.
    • Pour mixture into a greased 9-inch x 13-inch baking dish, spreading evenly.
    • Sprinkle reserved cracker and cheese mixture over the top. Dot evenly with 2 tablespoons of butter.
  5. Final Touch:
    • Bake in preheated oven for 25 minutes, or until topping is golden brown and casserole is heated through.

Presentation and Serving:

  • Serve Yellow Squash Casserole warm as a delightful side dish alongside your favorite main course.

Serving and Storage Tips:

Serving Suggestions:

  • Warm and Welcoming: Serve the Yellow Squash Casserole fresh from the oven to enjoy its comforting flavors at their best.
  • Pairing Perfection: It pairs wonderfully with grilled chicken, roasted meats, or even as a tasty vegetarian main dish.
  • Garnish Game: For a touch of freshness, sprinkle chopped parsley or chives on top before serving.

Storage Tips:

  • Refrigeration: Store any leftover casserole in an airtight container in the refrigerator for up to 3-4 days.
  • Freezing: Yellow Squash Casserole can be frozen for longer storage. Ensure it’s tightly wrapped or stored in a freezer-safe container for up to 2-3 months.
  • Reheating: To reheat, place the casserole in a preheated oven at 350 degrees Fahrenheit for about 15-20 minutes, or until heated through. Alternatively, microwave individual servings until hot.

Enhancing Leftovers:

  • Revamp and Refresh: Leftover casserole can be repurposed into a delicious breakfast by serving with a fried egg on top.
  • Creative Twist: Use leftovers as a filling for sandwiches or wraps for a quick and tasty lunch option.

By following these serving and storage tips, you can maximize the enjoyment of your Yellow Squash Casserole from preparation to leftover reinventions.


  1. Herb Infusion: Enhance the flavor profile by adding fresh herbs like thyme, basil, or parsley to the squash mixture before baking.
  2. Spice it Up: For a kick of heat, mix in a pinch of red pepper flakes or cayenne pepper into the cheese and cracker topping mixture.
  3. Extra Veggies: Incorporate other vegetables such as diced bell peppers, spinach, or mushrooms for added texture and nutritional variety.
  4. Different Cheeses: Experiment with different cheeses such as Gruyere, mozzarella, or pepper jack to create unique flavor combinations.
  5. Crunchy Toppings: Substitute Ritz crackers with crushed potato chips, French fried onions, or breadcrumbs for a different texture on top.
  6. Protein Boost: Mix in cooked bacon bits, diced ham, or shredded chicken to turn this side dish into a hearty main course.
  7. Gluten-Free Option: Use gluten-free crackers or breadcrumbs and ensure all other ingredients are gluten-free to accommodate dietary preferences.
  8. Creamy Addition: Stir in a dollop of sour cream or Greek yogurt to the squash mixture for a creamier texture and tangy flavor.
  9. Nutty Twist: Sprinkle chopped nuts such as almonds or pecans on top of the casserole before baking for added crunch and richness.
  10. Sweet and Savory: Add a touch of sweetness by mixing in a tablespoon of honey or maple syrup to the squash mixture for a delightful contrast.
  11. Italian Inspired: Add a teaspoon of Italian seasoning or dried oregano and basil to the squash mixture. Top with shredded Parmesan cheese before baking for an Italian twist.
  12. Tex-Mex Twist: Mix in a can of diced green chilies and a teaspoon of cumin into the squash mixture. Top with a blend of Mexican cheeses and garnish with chopped cilantro after baking.
  13. Mediterranean Style: Stir in chopped sun-dried tomatoes, Kalamata olives, and crumbled feta cheese into the squash mixture. Top with a sprinkle of breadcrumbs mixed with dried herbs like thyme and rosemary.
  14. Bacon and Ranch: Mix cooked and crumbled bacon pieces into the squash mixture along with a tablespoon of ranch seasoning mix. Top with extra shredded cheddar cheese and a drizzle of ranch dressing before serving.
  15. Curry Infused: Add a tablespoon of curry powder to the sautéed onions and garlic. Stir in a handful of golden raisins and chopped almonds into the squash mixture. Top with a mixture of breadcrumbs and shredded coconut before baking for a unique flavor profile.

Try these variations to customize your Yellow Squash Casserole to suit your taste preferences and make each batch uniquely delicious!


  1. Can I use zucchini instead of yellow squash? Yes, you can substitute zucchini for yellow squash in this recipe. The flavors and textures are similar, so it will work well.
  2. Can I make this casserole ahead of time? Yes, you can assemble the casserole ahead of time and refrigerate it before baking. Just add a few extra minutes to the baking time if baking it straight from the fridge.
  3. What if I don’t have Ritz crackers? You can use other similar buttery crackers or even breadcrumbs as a substitute for Ritz crackers in the topping.
  4. Is it possible to make this casserole dairy-free? Yes, you can use dairy-free alternatives such as vegan cheese, almond milk, and vegan butter to make this casserole dairy-free.
  5. Can I freeze Yellow Squash Casserole? Yes, you can freeze it. Make sure it’s tightly wrapped or stored in a freezer-safe container. Thaw overnight in the refrigerator before reheating.
  6. How do I know when the casserole is done baking? The casserole is done when the topping is golden brown and crispy, and the casserole is heated through. This typically takes about 25 minutes in a preheated oven.
  7. What can I serve with Yellow Squash Casserole? It pairs well with grilled meats, roasted chicken, or as a side dish alongside a fresh green salad.
  8. Can I add more vegetables to the casserole? Absolutely! You can add diced bell peppers, spinach, or mushrooms to the sautéed onions and garlic for added flavor and nutrition.
  9. How many servings does this recipe make? This recipe yields about 8 servings, making it suitable for a family dinner or gathering.
  10. Can I use frozen yellow squash instead of fresh? Yes, you can use frozen yellow squash. Thaw and drain excess water before sautéing it with the onions and garlic as directed in the recipe.

These frequently asked questions provide helpful insights and solutions to common queries about preparing and customizing Yellow Squash Casserole.

With a prep time of just 10 minutes and a cook time of 25 minutes, this Yellow Squash Casserole is not only delicious but also easy to prepare. Enjoy the rich flavors and hearty textures of this dish, perfect for family dinners or entertaining guests. Add it to your recipe collection today for a guaranteed crowd-pleaser!