Introduction
Delve into this delightful yellow squash casserole that brings together the comforting flavors of savory cheese, creamy textures, and a crunchy topping. Perfect as a side dish for family gatherings or a cozy dinner, this recipe showcases the versatility of seasonal squash. Let’s explore the ingredients and steps needed to create this scrumptious dish.
Ingredients
6 tablespoons unsalted butter, divided (¾ stick), plus more for greasing the pan
3 pounds yellow squash, sliced ¼-inch thick
1 medium sweet onion, chopped
2 teaspoons kosher salt, divided
2 large eggs, beaten
1 cup sour cream
½ cup mayonnaise
8 ounces freshly shredded sharp cheddar cheese, divided
1 tablespoon chopped fresh chives, plus more for garnish
½ teaspoon ground black pepper
2 sleeves round buttery crackers, coarsely crushed
Prep Time
15 minutes
Cook Time
20 minutes
Total Time
35 minutes
Yield
Serves 6-8
This yellow squash casserole is sure to become a favorite in your household. With its rich flavors and satisfying crunch, it’s a dish that celebrates the joys of fresh summer produce while being simple enough for any weeknight dinner. Enjoy!
Detailed Directions and Instructions
Step 1: Preheat the Oven
Preheat the oven to 350°F. Grease an 11×7-inch baking dish with butter to ensure easy serving and cleanup.
Step 2: Sauté the Vegetables
Melt 2 tablespoons of unsalted butter in a large skillet over medium heat. Once the butter has melted, stir in the sliced yellow squash, chopped sweet onion, and 1 teaspoon of kosher salt. Cook the mixture, stirring occasionally, until the vegetables are softened, about 8 to 10 minutes.
Step 3: Drain the Squash Mixture
Transfer the cooked squash mixture to a colander set over the sink to drain any excess moisture. Allow it to drain for about 5 minutes to remove unwanted liquid.
Step 4: Prepare the Egg Mixture
In a large mixing bowl, combine the beaten large eggs, sour cream, mayonnaise, half of the freshly shredded sharp cheddar cheese (4 ounces), chopped fresh chives, the remaining 1 teaspoon of kosher salt, and ground black pepper. Mix well until all ingredients are properly incorporated.
Step 5: Combine Squash and Egg Mixture
Add the drained squash mixture to the egg mixture. Gently fold the two mixtures together until combined evenly. Be careful not to overmix to keep some texture in the squash.
Step 6: Assemble in the Baking Dish
Pour the combined squash and egg mixture into the prepared greased baking dish. Smooth the top with a spatula. Sprinkle the remaining 4 ounces of cheddar cheese evenly over the top.
Step 7: Prepare the Cracker Topping
In a medium bowl, melt the remaining 4 tablespoons of butter. Stir in the coarsely crushed round buttery crackers until they are fully coated in the melted butter. This will create a crunchy topping.
Step 8: Add Cracker Topping and Bake
Sprinkle the butter-coated cracker mixture evenly over the cheese layer on the squash dish. Bake in the preheated oven for 20 minutes or until the filling is warmed through and the topping has turned a golden brown color.
Step 9: Let Cool and Serve
Once baked, remove the dish from the oven and let it cool for about 5 minutes. If desired, top with extra chopped chives for garnish before serving.
Notes
Serving Suggestions
This dish can be served as a main or side dish. It pairs well with grilled meats or a fresh garden salad.
Storage Instructions
Leftovers can be stored in an airtight container in the refrigerator for up to 3 days. Reheat in the oven or microwave before serving.
Ingredient Substitutions
You can use zucchini instead of yellow squash for a different flavor. Additionally, Greek yogurt can be substituted for sour cream if a lighter option is desired.

Cook techniques
Melt Butter
Melt butter in a skillet over medium heat to enhance flavor and allow it to mix with other ingredients smoothly.
Sauté
Sauté yellow squash and onion to soften them, developing their flavor and making them easier to incorporate into the dish.
Drain
Use a colander to drain excess moisture from the cooked squash mixture. This ensures a firmer texture in the final dish.
Mix Ingredients
Combine eggs, sour cream, mayonnaise, cheese, chives, salt, and pepper in a large bowl to create a creamy, flavorful base.
Fold
Gently fold in the drained squash to avoid breaking down the squash too much, keeping the mixture light and airy.
Layer
Pour the squash mixture into a greased baking dish, maintaining layers with cheese on top for a golden crust.
Combine Topping
Mix melted butter with crushed crackers to create a buttery topping that adds a crunchy texture to the dish.
Bake
Bake until heated through and toppings become golden brown for a delicious crispy layer on top.
FAQ
Can I use other types of cheese?
Yes, you can substitute sharp cheddar with other cheese varieties like mozzarella or Monterey Jack, depending on your taste preference.
How can I make this dish vegetarian?
This recipe is already vegetarian as it contains no meat. You can enhance flavor by using more vegetables if desired.
Can I prepare this dish ahead of time?
Yes, you can prepare the squash mixture in advance. Just assemble and bake when ready to serve.
What pan size is recommended?
An 11×7-inch baking dish is recommended, but you can also use a similar-sized dish that will hold the mixture comfortably.
How do I store leftovers?
Store leftovers in an airtight container in the refrigerator for up to 3-4 days. Reheat in the oven for best results.
Conclusion
This creamy squash casserole is a delicious blend of flavors, highlighted by the richness of cheddar cheese and the freshness of chives. The combination of buttery crackers on top adds a satisfying crunch, making it a perfect side dish for any meal. Its ease of preparation and comforting taste make it a go-to recipe for gatherings or weeknight dinners.
More recipes suggestions and combination
Vegetable Medley Casserole
Combine yellow squash with zucchini, bell peppers, and a hint of garlic for a colorful and nutritious dish.
Cheesy Spinach Bake
Substitute half of the squash with fresh spinach and add feta cheese for a Mediterranean twist.
Corn and Jalapeño Casserole
Mix in sweet corn kernels and diced jalapeños for a spicy and sweet flavor profile.
Herbed Chicken and Squash Bake
Incorporate diced cooked chicken into the squash mixture, seasoned with Italian herbs for a hearty main dish.
Savory Breakfast Casserole
Layer this squash mixture with cooked sausage and serve it as a delicious breakfast option.
Spinach and Artichoke Dip Casserole
Combine the squash with artichokes and additional cream cheese to create a rich, savory dip baked to perfection.
