Easy Yellow Squash Casserole Recipe

There’s something so comforting about a homemade yellow squash casserole fresh from the oven. With its creamy texture, cheesy topping, and perfectly baked squash, this dish is a staple at family gatherings and weeknight dinners alike. The rich, buttery flavor combined with a golden, crispy crust makes it simply irresistible.

I first discovered this recipe when looking for a way to use up an abundance of summer squash from my garden. Since then, it has become a favorite side dish that pairs beautifully with grilled chicken, roasted meats, or even as a standalone meal. Whether you’re feeding a crowd or just looking for a cozy meal, this casserole is a must-try.

Why You'll Love This Yellow Squash Casserole

Get ready to fall in love with one of the easiest and most delicious casseroles you’ll ever make. This yellow squash casserole is a go-to dish for so many reasons.

First, it’s incredibly simple to make. With just a handful of pantry staples and fresh squash, you can have this dish prepped and ready for the oven in no time.

It’s also budget-friendly. Squash is often one of the most affordable vegetables, and this recipe makes the most of it with just a few additional ingredients to create a rich, satisfying dish.

Another reason to love this casserole is its versatility. It pairs well with almost any main course and can even be customized with different cheeses, seasonings, or toppings to suit your preferences.

Best of all, it’s a family favorite. Even picky eaters will enjoy the creamy texture and cheesy goodness packed into every bite.

Ingredients Notes

The beauty of this yellow squash casserole lies in its simple yet flavorful ingredients. Each one plays a crucial role in making this dish a comforting classic.

Yellow squash is the star of the show. Choose firm, bright yellow squash with smooth skin for the best flavor and texture. While fresh is always best, frozen squash can be used in a pinch—just be sure to drain it well.

Onions add a touch of sweetness and depth to the dish. Sautéing them before mixing ensures they become tender and release their natural flavors, blending perfectly with the squash.

Cheddar cheese gives the casserole its signature rich and creamy texture. A sharp cheddar works best, but feel free to experiment with mild cheddar, Colby, or even a mix of cheeses for added complexity.

Sour cream and eggs help bind the casserole together while adding a tangy creaminess that enhances the overall flavor. Greek yogurt can be substituted for sour cream if you prefer a lighter option.

Cracker crumbs on top provide the perfect crispy contrast to the soft, creamy filling. Buttered crackers like Ritz create a deliciously golden crust, but panko breadcrumbs or even crushed cornflakes work well as alternatives.

How To Make This Yellow Squash Casserole

Making this casserole is as easy as it is delicious. Follow these simple steps to create a dish that will quickly become a household favorite.

Start by preheating your oven to 350°F. While the oven heats up, slice the yellow squash into thin rounds and dice the onion. In a large skillet over medium heat, melt a little butter and sauté the squash and onion until tender. This usually takes about 8-10 minutes. Drain any excess liquid to prevent a watery casserole.

In a large mixing bowl, combine the cooked squash and onions with shredded cheddar cheese, sour cream, and beaten eggs. Stir everything together until well incorporated. The eggs will help the casserole set, while the sour cream adds a deliciously creamy texture.

Next, transfer the mixture into a greased baking dish. Spread it evenly to ensure consistent cooking. Crush some crackers and mix them with melted butter before sprinkling the mixture over the top of the casserole. This creates a crispy, golden topping that makes every bite even more delightful.

Place the dish in the preheated oven and bake for about 30 minutes, or until the top is golden brown and the casserole is set. The edges should be slightly crisp, and the cheese should be bubbly and irresistible.

Once out of the oven, let it rest for a few minutes before serving. This helps the flavors meld together and makes slicing easier.

Storage Options

If you have leftovers, storing this yellow squash casserole is easy. Simply let it cool completely before transferring it to an airtight container. It will keep well in the refrigerator for up to four days.

To freeze, place the fully baked and cooled casserole in a freezer-safe dish, tightly wrap it in plastic wrap and foil, and store it for up to three months. When ready to enjoy, thaw overnight in the refrigerator and reheat in the oven at 350°F until warmed through.

Reheating is simple—pop a portion in the microwave for a quick meal or warm it in the oven for a crispier texture.

Variations and Substitutions

This casserole is wonderfully adaptable, making it easy to tweak based on your preferences or dietary needs.

For a different flavor profile, try swapping cheddar for parmesan or mozzarella. Each cheese brings its own unique touch to the dish.

If you prefer a gluten-free version, substitute the cracker topping with gluten-free breadcrumbs or crushed pork rinds for extra crunch.

Adding protein is another great way to make this dish heartier. Cooked and crumbled bacon, diced ham, or shredded chicken blend well with the creamy squash base.

Spice it up by mixing in a pinch of cayenne pepper, smoked paprika, or even a bit of hot sauce for a subtle kick.

For a lighter version, swap out sour cream for Greek yogurt and use reduced-fat cheese. It still delivers plenty of flavor while cutting down on calories.

This yellow squash casserole is a comforting, crowd-pleasing dish that’s easy to make and even easier to love. Whether served as a side or enjoyed on its own, it’s a recipe you’ll return to time and time again. Give it a try and see just how delicious simple ingredients can be!

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