The Ultimate Southern Yellow Squash Casserole: A Creamy, Cheesy Family Favorite

Prepare to fall in love with the classic Southern Yellow Squash Casserole, a delightful side dish that promises creamy, cheesy goodness with every bite. It’s not just easy to make; it’s unbelievably delicious and guaranteed to be a hit at any table. Whether you’re a long-time squash lover or a hesitant diner, this recipe has a magical way of converting everyone. Even those who typically shy away from squash, like my own husband, find themselves asking for seconds!

As summer approaches and yellow squash becomes abundant, there’s no better way to utilize this versatile vegetable than in this comforting casserole. Its mild flavor transforms into something extraordinary when baked with rich cheeses, savory onions, and a buttery, crisp topping. This dish isn’t just food; it’s a warm hug from the heart of Southern hospitality, making it perfect for family dinners, holiday gatherings, or simply when you crave something truly special.

While you’re exploring delightful side dishes, why not also try our incredibly fresh and simple Strawberry Shortcake for a sweet ending? It’s a perfect complement to any hearty meal.

The Irresistible Appeal of Southern Yellow Squash Casserole

What makes Southern Yellow Squash Casserole such a beloved dish? It’s the perfect harmony of textures and flavors. Tender, sautéed yellow squash and onions are folded into a luscious, creamy sauce made with sour cream, cream of celery soup, and generous amounts of sharp cheddar cheese. All of this is crowned with a crispy, buttery herb stuffing topping that bakes to a golden perfection. The result is a casserole that’s both comforting and elegant, hearty yet surprisingly light.

This casserole isn’t just about taste; it’s about ease. With straightforward steps and readily available ingredients, even novice cooks can achieve fantastic results. It’s the kind of dish that brings people together, evoking memories of home-cooked meals and Southern charm. Plus, it’s highly versatile, pairing wonderfully with everything from roasted meats to grilled chicken.

Unlocking the Flavors: Key Ingredients and Their Roles

Every ingredient in this Southern Yellow Squash Casserole plays a crucial role in creating its iconic flavor profile. Understanding their contribution will help you appreciate the magic of this dish even more.

• Yellow Summer Squash: The star of the show! When sliced and gently sautéed, yellow squash becomes tender and sweet, absorbing the flavors of the other ingredients beautifully. Its delicate texture prevents the casserole from being too heavy.
• Onions and Garlic: These aromatic powerhouses lay the foundation of flavor. Sautéing them with the squash creates a rich, savory base that enhances the entire dish. Don’t skimp on these for that authentic Southern taste.
• Butter: Essential for sautéing the vegetables to perfection and creating that irresistible crispy topping. Butter adds richness and depth that oil simply cannot replicate.
• Sour Cream: This is where the creamy texture begins. Sour cream adds a delightful tang and richness that balances the sweetness of the squash and the savory notes of the cheese and soup.
• Cream of Celery Soup: A classic Southern casserole ingredient, cream of celery soup contributes to the incredible creaminess and adds a subtle, savory depth without overpowering the other flavors.
• Sharp Cheddar Cheese: For that irresistible cheesy pull and tangy flavor. Sharp cheddar melts beautifully and forms a gooey, comforting layer that complements the squash perfectly. You can also experiment with other cheeses like Colby Jack or a mix of cheddar and Monterey Jack.
• Herb Stuffing Mix: The secret to the golden, crispy topping! When mixed with melted butter and baked, the stuffing mix creates a textural contrast that elevates the casserole from good to extraordinary. It offers a wonderful crunch against the soft, creamy interior.
• Salt and Pepper: Simple seasonings that are critical for bringing out all the natural flavors of the vegetables and the creamy sauce. Seasoning generously at each stage ensures a well-rounded taste.

Mastering the Method: Simple Steps to Casserole Perfection

Creating this delicious Southern Yellow Squash Casserole is a straightforward process. Follow these steps for a dish that will impress everyone:

1. Prepare Your Workspace: Start by preheating your oven to 350°F (175°C). This ensures it’s ready for baking as soon as your casserole is assembled. Lightly grease a 9×13 inch baking dish – a little butter or nonstick spray will do the trick to prevent sticking.
2. Sauté the Vegetables: In a large skillet, melt three tablespoons of butter over medium heat. Add your sliced yellow squash and diced onions. Season generously with salt and fresh ground pepper. Sauté this mixture for about 15 minutes, stirring occasionally, until the squash becomes tender but still holds its shape. Stir in the minced garlic for the last 2-3 minutes of cooking, allowing its aroma to deepen the flavor base without burning.
3. Create the Creamy Base: While the squash cools slightly, prepare the creamy mixture. In a small bowl, combine the sour cream, cream of celery soup, grated sharp cheddar cheese, and additional salt and pepper to taste. Mix until everything is well incorporated.
4. Combine and Assemble: Transfer the sautéed squash and onion mixture into a large mixing bowl. Pour the creamy sour cream and cheese mixture over the squash and stir gently until all the vegetables are evenly coated.
5. Prepare the Topping: In a separate small bowl, combine 1 1/2 cups of herb stuffing mix with three tablespoons of melted butter. Stir until the stuffing crumbs are evenly moistened.
6. Layer and Bake: Pour the squash mixture into your prepared baking dish, spreading it out evenly. Then, sprinkle the buttered stuffing mix over the top, creating a consistent layer. Bake for 35 to 40 minutes, or until the casserole is bubbling around the edges and the topping is beautifully golden brown.
7. Rest and Serve: Once out of the oven, let the casserole cool for about 10-15 minutes before serving. This crucial resting period allows the casserole to set, making it easier to serve and enhancing its creamy texture.

Pro Tips for the Best Southern Yellow Squash Casserole

To elevate your squash casserole from great to unforgettable, consider these expert tips:

• Don’t Overcook the Squash: Sauté until tender-crisp. Overcooked squash can release too much water and make the casserole watery.
• Drain Excess Moisture: After sautéing, if your squash looks particularly watery, you can lightly press it with a paper towel or drain any excess liquid from the skillet before mixing with the cream sauce.
• Choose Quality Cheese: Freshly grated sharp cheddar makes a significant difference in flavor and melt. Pre-shredded cheeses often contain anti-caking agents that can affect texture.
• Season in Layers: Season the squash and onions generously, and then taste and adjust the seasoning in the cream mixture. This builds layers of flavor.
• Customize Your Topping: While herb stuffing mix is traditional, you can also use crushed Ritz crackers, cornbread crumbs, or panko breadcrumbs mixed with melted butter for a different crunch.
• Make Ahead Option: Assemble the casserole up to the point of baking, cover, and refrigerate for up to 24 hours. Add an extra 10-15 minutes to the baking time if baking from cold.
• Resting is Key: Allowing the casserole to rest after baking helps it set and prevents it from falling apart when scooped.

Delicious Variations and Substitutions

While the classic Southern Yellow Squash Casserole is perfect as is, feel free to experiment and make it your own:

• Cheesy Choices: Beyond sharp cheddar, try a blend of Gruyère and Parmesan for a nuttier flavor, or a Colby Jack for milder cheesiness.
• Add a Protein: For a heartier meal, stir in cooked shredded chicken, diced ham, or crispy bacon bits to the squash mixture before baking.
• Vegetable Medley: Incorporate other summer vegetables like zucchini, corn kernels, or diced bell peppers for added color and nutrients.
• Spice It Up: A pinch of cayenne pepper or a dash of hot sauce in the cream mixture can add a subtle kick.
• Healthier Options: For a lighter version, use light sour cream, a low-sodium cream of celery soup, and whole wheat breadcrumbs for the topping. You can also make your own cream sauce from scratch using a roux and milk to avoid canned soup.
• Herb Boost: Fresh herbs like chives, parsley, or thyme can be added to the squash mixture for an extra layer of freshness.

If you’re looking for another comforting, keto-friendly side dish, be sure to check out our Loaded Cauliflower Mash Casserole!

Serving Suggestions and Storage Tips

This casserole is incredibly versatile and makes a fantastic accompaniment to a variety of main courses.

• Classic Pairings: Serve alongside fried chicken, roasted pork tenderloin, baked ham, or grilled steak for a quintessential Southern meal.
• Holiday Feast: It’s a staple for Thanksgiving and Christmas dinners, adding a flavorful vegetable dish to the spread.
• Weeknight Wonder: Simple enough for a weeknight dinner, paired with a simple protein and a green salad.

Storing and Reheating

One of the best things about this casserole is that it tastes even better the next day! The flavors meld and deepen overnight, creating an even richer experience. Simply cover any leftovers tightly with plastic wrap or aluminum foil and refrigerate for up to 3-4 days. To reheat, you can either warm individual portions in the microwave or bake the entire casserole in a preheated oven at 300°F (150°C) until heated through, approximately 20-30 minutes, covering loosely with foil if the topping starts to brown too much.

Looking for a fresh and easy starter or side? Our Fresh Tomato Mozzarella Salad is light, vibrant, and a wonderful contrast to this rich casserole.

Frequently Asked Questions About Southern Yellow Squash Casserole

Can I use frozen squash for this casserole?

While fresh yellow squash is recommended for the best texture, you can use frozen. Make sure to thaw and thoroughly drain the squash to remove excess water before sautéing, otherwise, your casserole might be watery.

What kind of yellow squash should I use?

Any variety of yellow summer squash, often referred to as straightneck or crookneck squash, will work wonderfully. Choose firm, blemish-free squash for the best results.

Can I make this casserole gluten-free?

Yes, you can! Use gluten-free cream of celery soup (or make a homemade gluten-free cream sauce) and a gluten-free stuffing mix or gluten-free breadcrumbs for the topping.

Why is my casserole watery?

This is usually due to the squash releasing too much moisture. Ensure you sauté the squash until tender-crisp, and if it still seems very wet, drain any excess liquid before combining it with the cream mixture.

Can I freeze Southern Yellow Squash Casserole?

Yes, you can freeze it! Assemble the casserole (without the topping) in a freezer-safe dish, cover tightly, and freeze for up to 3 months. Thaw overnight in the refrigerator, then add the topping and bake as directed, potentially adding extra baking time.

Southern Yellow Squash Casserole Recipe

Southern Yellow Squash Casserole Recipe

Southern Yellow Squash Casserole – CRAZY delicious! A creamy, cheesy, and easy side dish perfect for any meal, especially when summer squash is in season.

Rating: 4.78 out of 5 stars based on 9 votes

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Course: Side Dish, Vegetable

Cuisine: American, Southern

Prep Time: 20 minutes

Cook Time: 1 hour

Total Time: 1 hour 20 minutes

Servings: 6

Calories: 446 kcal

Author: Leigh Harris

Ingredients

Main Casserole:

• 3 tablespoons butter
• 2 pounds yellow summer squash, sliced into 1/2 inch chunks (about 6 medium)
• 1/2 medium onion, diced
• 1 teaspoon salt
• 1/2 teaspoon fresh ground pepper
• 2 cloves garlic, minced
• 1/2 cup sour cream
• 1 10.5 oz can cream of celery soup
• 1 cup sharp cheddar cheese, grated

Topping:

• 1 1/2 cups herb stuffing mix
• 3 tablespoons butter, melted

Instructions

1. Preheat the oven to 350°F (175°C).
2. Lightly grease a 9×13 inch baking dish.
3. Heat a large skillet over medium heat. Add 3 tablespoons butter. Once melted, add the sliced squash, diced onions, and season generously with salt and pepper. Sauté for about 15 minutes, stirring occasionally, or until the squash is tender.
4. Stir in the minced garlic and sauté for another 2-3 minutes until fragrant. Remove from heat.
5. In a small bowl, combine the sour cream, cream of celery soup, grated cheddar cheese, and additional salt and pepper to taste. Mix until well combined.
6. Transfer the cooked squash mixture to a large bowl. Pour the cream mixture over the squash and stir until everything is evenly combined.
7. Pour the squash mixture into the greased casserole dish, spreading it evenly.
8. In another small bowl, mix the herb stuffing with 3 tablespoons of melted butter until moistened.
9. Spoon the buttered stuffing mix evenly over the top of the squash mixture.
10. Bake for 35 to 45 minutes, or until the casserole is bubbly and the topping is golden brown.
11. Let cool for about 10-15 minutes before serving to allow it to set. Enjoy!

Nutrition Information (per serving)

Calories: 446kcal | Carbohydrates: 43g | Protein: 13g | Fat: 26g | Saturated Fat: 14g | Cholesterol: 66mg | Sodium: 1501mg | Potassium: 613mg | Fiber: 4g | Sugar: 9g | Vitamin A: 1114IU | Vitamin C: 27mg | Calcium: 245mg | Iron: 3mg

Recipe inspired by FiveHeartHome

Conclusion

This Southern Yellow Squash Casserole is more than just a recipe; it’s a celebration of comfort, tradition, and delicious simplicity. Its creamy, cheesy, and tender interior topped with a golden, buttery crunch makes it an undeniable favorite for any occasion. Whether you’re gathering with family, hosting friends, or simply craving a taste of the South, this casserole delivers on all fronts. Give this classic recipe a try, and you’ll quickly understand why it’s a cherished dish passed down through generations. Happy cooking!