Name: Baked Squash Casserole With Fresh Yellow Squash
Prep time: 20 min
Cook time: 25 min
Total time: 45 min
Cuisine: Southern
Ingredients: 6 cups thinly sliced fresh yellow squash (about 5–6 medium); 1 small onion, finely chopped; 2 tablespoons olive oil (or butter), divided; 2 garlic cloves, minced; 1/2 teaspoon salt, plus more to taste; 1/4 teaspoon black pepper; 1 teaspoon dried Italian herbs (or 1/2 tsp thyme + 1/2 tsp oregano); 1 large egg, lightly beaten; 1/2 cup sour cream (or Greek yogurt); 1 cup shredded sharp cheddar cheese; 1/4 cup grated Parmesan (in the filling); 1 cup panko breadcrumbs; 2 tablespoons melted butter; 2 tablespoons grated Parmesan (for the topping); 2 tablespoons chopped fresh parsley (for garnish)

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This baked squash casserole recipe with fresh yellow squash is a cozy dish that feels like home at every bite. It’s a classic southern-style casserole, perfect for weeknight comfort food or a holiday side dish. In this article, you’ll find not just the recipe but also the story behind its comforting flavors, the best cooking methods, ingredient tips, and helpful FAQs to make it foolproof. Whether you’re preparing a holiday spread, Sunday family dinner, or simply want a quick vegetable meal, this yellow squash casserole recipe can easily become one of your go-to dishes.

Why Baked Squash Casserole Holds a Special Spot in Southern Homes

Growing up in southern kitchens often means sharing meals that feel like a warm hug, and baked squash casserole is one of those recipes that never fails to bring people together. I still remember standing by the stove as my grandmother sliced fresh yellow squash from her backyard garden. She believed the best recipe for yellow squash was always the simplest: a mix of tender squash, creamy filling, and a golden crust baked until bubbly. That dish became a tradition on our Sunday table, always reminding us that food has the power to create memories as much as it does flavors.

What makes baked squash casserole so timeless is its blend of comfort and simplicity. With just a few affordable ingredients—like fresh squash, onions, cheese, and breadcrumbs—you can transform an abundance of seasonal produce into a dish that feels both hearty and nostalgic. Southern comfort food often celebrates humble vegetables, and this recipe is no exception. By turning everyday yellow squash into a flavorful, oven-baked dish, families keep alive the tradition of stretching seasonal ingredients into something delicious. It’s no wonder this casserole continues to hold a special place at potlucks, church gatherings, and holiday spreads across the South.

The joy of squash casserole is not just in its flavor but also in its versatility. Whether it’s the centerpiece of a vegetarian meal or a trusty side next to roasted meats, its creamy filling and crisp topping make it loved by all generations. This balance between wholesome vegetables and indulgent texture is exactly what makes people come back for seconds every time.

The Recipe for Yellow Squash Casserole

Ingredients and Substitutions

The heart of this dish lies in its fresh, seasonal yellow squash. When combined with just a few everyday pantry and fridge staples, you get a creamy, golden casserole that is as nourishing as it is satisfying. Here’s a basic lineup of what you’ll need:

Fresh Yellow Squash (6–7 medium) – Thinly sliced; the star of the recipe for yellow squash.
Onion (1 medium, finely diced) – Adds flavor depth and balances the sweetness of squash.
Eggs (2 large) – Provide binding to achieve a smooth, custardy consistency.
Shredded Cheese (1 ½ cups) – Cheddar is most traditional, but mozzarella, Monterey Jack, or a mix works beautifully.
Breadcrumbs or Crushed Crackers (1 cup divided) – Essential for that golden baked topping.
Heavy Cream or Milk (1 cup) – Creates a silky base while keeping the casserole moist.
Butter (4 tablespoons) – For sautéing and adding richness to the topping.
Salt, Pepper, and Garlic Powder – Simple seasoning to let the natural flavor of squash shine.

Optional flavors & variations: Add zucchini, bell peppers, or mushrooms for variety. Herbs like thyme, parsley, or chives bring freshness. A pinch of paprika or cayenne adds warmth. Use gluten-free breadcrumbs for dietary needs, or switch cheeses with Parmesan or Gruyère for a richer profile.

Step-by-Step Preparation Method

Prepping the yellow squash for baking:

Wash and slice the squash into thin rounds for even cooking.
Sauté squash and diced onion in butter for 8–10 minutes until softened and moisture reduces.
Drain excess liquid by spreading the mixture on paper towels to avoid sogginess.

Baking techniques:

Preheat oven to 350°F (175°C).
Whisk eggs, cream, half of the cheese, and seasonings in a large bowl. Stir in the prepared squash and onion.
Pour mixture into a greased 9×13 casserole dish and smooth the top.
Mix breadcrumbs, melted butter, and remaining cheese. Sprinkle over the top.
Bake uncovered for 30–35 minutes until bubbly and golden.
Let rest for 5–10 minutes before serving.

The result is a bubbling, golden casserole with a crunchy topping and creamy filling that celebrates the sweetness of yellow squash.

Tips, Serving Ideas & Storage

Cooking Tips for Squash Casserole Recipe Easy

How to avoid watery squash casserole: Salt the slices for 10–15 minutes to draw moisture. Sauté before baking to release liquid, then drain well with paper towels. This ensures the casserole sets properly and slices neatly.

How to achieve creamy and cheesy layers: Whisk eggs thoroughly for a custard-like base. Use a cheese blend for flavor and stretch. Heavy cream adds richness though milk works lighter. Baking at steady 350°F ensures set consistency without drying, and the cheese-breadcrumb topping balances crunch and cream.

Serving & Storing Baked Squash Casserole

Serving ideas:

Perfect for weeknight dinners alongside chicken or pork.
A star side during Thanksgiving or Christmas feasts.
A reliable potluck dish since it reheats and travels well.
Vegetarian centerpiece paired with cornbread or roasted potatoes.

Storage & reheating:

Refrigeration: Store in airtight containers up to 3–4 days.
Freezing: Wrap cooled portions tightly or use freezer-safe containers. Freeze up to 2 months.
Reheating: Warm covered at 350°F for 15–20 minutes. Remove foil during the last minutes to crisp the topping.
After freezing: Thaw overnight in the fridge before reheating for best results.

Frequently Asked Questions About Squash Casserole

1. Can I prepare squash casserole ahead of time?
Yes. Assemble a day ahead, cover, and refrigerate. Bake as directed, adding a few extra minutes if cold.

2. How do I keep squash from getting mushy?
Pre-salt slices, sauté before baking, drain well, and bake uncovered to release steam.

3. Can I use zucchini instead of yellow squash?
Yes! Zucchini works well and can be combined with squash for a colorful dish.

4. What cheese works best for this casserole?
Cheddar is classic, but mozzarella, Monterey Jack, Parmesan, or Gruyère are excellent substitutions.

5. How long does baked squash casserole last in the fridge?
Up to 3–4 days in the refrigerator, or freeze for longer storage.

Conclusion

Baked squash casserole with fresh yellow squash is more than just a recipe—it’s a tradition rooted in southern comfort. With just a few simple ingredients, it transforms seasonal vegetables into a rich, golden dish beloved at dinners and special gatherings alike.

By mastering moisture control, cheese pairing, and baking techniques, you’ll achieve the balance of a creamy interior and crisp topping every time. This casserole adapts to holidays, family dinners, or meal prep, making it a versatile addition to your cooking rotation.

Celebrate the season with this timeless casserole. Keep the classic flavors while adding your own variations, and it will remain a comforting favorite for years to come.