Name: Summer Squash Casserole
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Cuisine: American
Ingredients: 4 cups sliced yellow squash; 1/2 cup chopped onion; 1 cup grated cheddar cheese; 1/2 cup sour cream; 1/4 cup mayonnaise; 1/2 teaspoon salt; 1/4 teaspoon black pepper; 1 cup crushed buttery crackers; 2 tablespoons butter, melted

Why You’ll Love Summer Squash Casserole Recipe

This Summer Squash Casserole is creamy, cheesy, and bursting with fresh flavor. It’s the perfect way to enjoy seasonal squash in a dish that’s both nostalgic and irresistible. With its crispy cracker topping and velvety filling, it satisfies a craving for comfort food while still showcasing vibrant, fresh ingredients. Best of all, it comes together with minimal prep, making it a go-to for busy weeknights or effortless entertaining.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

4 cups sliced yellow squash
1/2 cup chopped onion
1 cup grated cheddar cheese
1/2 cup sour cream
1/4 cup mayonnaise
1/2 teaspoon salt
1/4 teaspoon black pepper
1 cup crushed buttery crackers
2 tablespoons butter, melted

Directions

Preheat the oven to 350°F (175°C) and grease a 2-quart baking dish.
Cook the squash and onions in a large skillet over medium heat until tender, about 10 minutes. Drain any excess liquid.
Combine the filling in a large bowl by mixing the cooked squash and onions with cheddar cheese, sour cream, mayonnaise, salt, and pepper.
Transfer the mixture to the prepared baking dish and spread it out evenly.
Top with crushed crackers and drizzle the melted butter over the top.
Bake for 25–30 minutes until golden brown and bubbly.
Let cool slightly before serving.

Servings and timing

This recipe yields approximately 6 servings.
Prep time: 15 minutes
Cook time: 30 minutes
Total time: 45 minutes

Variations

Add protein: Mix in cooked, shredded chicken or diced ham for a heartier version.
Use different cheeses: Swap cheddar for mozzarella, Monterey Jack, or a blend of cheeses.
Try other squash: Replace yellow squash with zucchini or use a mix of both.
Spice it up: Add a pinch of cayenne or red pepper flakes for a little heat.
Make it gluten-free: Use gluten-free crackers or breadcrumbs for the topping.
Add herbs: Fresh thyme, parsley, or chives enhance the flavor beautifully.

Storage/Reheating

To store leftovers, place the casserole in an airtight container and refrigerate for up to 3 days.
To reheat, bake in a 350°F oven for about 15–20 minutes or until heated through. You can also microwave individual portions for 1–2 minutes, though the topping may lose some crispness.
For longer storage, freeze tightly covered portions for up to 2 months. Thaw overnight in the refrigerator before reheating.

FAQs

How do I prevent the casserole from being watery?

Make sure to cook and drain the squash well before mixing it with the other ingredients. Excess moisture can make the casserole soggy.

Can I prepare this dish ahead of time?

Yes, you can assemble the casserole (without the topping) a day in advance. Add the crackers and butter just before baking.

Can I use zucchini instead of yellow squash?

Absolutely. Zucchini is a great substitute and offers a similar texture and flavor.

What’s the best way to crush crackers for the topping?

Place them in a sealed zip-top bag and crush with a rolling pin or pulse them in a food processor.

Is there a dairy-free alternative for the filling?

You can use dairy-free cheese, vegan mayo, and plant-based sour cream to create a dairy-free version.

Can I freeze this casserole?

Yes, it freezes well. Cool it completely, wrap tightly, and freeze for up to 2 months.

What size baking dish should I use?

A 2-quart baking dish is perfect for this recipe, but you can also use an 8×8-inch square pan.

How can I make this dish lighter?

Use low-fat sour cream, light mayo, and reduce the amount of cheese and butter to lighten up the casserole.

Can I add breadcrumbs instead of crackers?

Yes, seasoned or plain breadcrumbs can be used as a topping instead of crushed crackers.

What dishes pair well with this casserole?

It pairs well with grilled meats, roasted chicken, or a fresh garden salad for a balanced meal.

Conclusion

Summer Squash Casserole is a simple yet satisfying dish that captures the essence of home-cooked comfort food. With its creamy texture, cheesy filling, and crunchy topping, it’s a versatile recipe you’ll want to make all season long. Whether served as a side or enjoyed as a main, this casserole is sure to become a beloved favorite at your table.