Classic Squash Casserole Recipe

If you’ve ever tasted that perfect, cozy baked dish at a family gathering or Southern potluck, you’ve probably fallen in love with Classic Squash Casserole Recipe. This irresistible side is creamy, cheesy, and topped with buttery crackers for a nostalgic crunch—just the way comfort food should be!

this Recipe

Ingredients You’ll Need

The magic of Classic Squash Casserole Recipe lies in how simple, down-to-earth ingredients combine for unforgettable flavor. Each element—rich dairy, fresh squash, and that signature cracker crunch—plays a starring role in both taste and texture.

• 6 tablespoons unsalted butter, divided: Brings rich flavor to the sautéed veggies and makes the cracker topping melt-in-your-mouth delicious.
• 3 lbs yellow squash, sliced 1/4-inch thick: Use fresh, firm squash for the best flavor, color, and tenderness—they’re the true star of the casserole!
• 1 sweet onion, chopped: Sweet onion rounds out the vegetable base with subtle aromatics (Vidalia is a favorite if you can find it).
• 2 teaspoons kosher salt, divided: Helps draw out squash’s moisture and perfectly seasons the entire casserole.
• 2 large eggs, lightly beaten: The eggs bind the filling, giving it a creamy-yet-sliceable texture.
• 1 cup sour cream: Adds creaminess and a gentle tang—don’t skip it!
• 1 1/2 cups sharp cheddar cheese, grated: Freshly grated cheddar melts beautifully and gives you that craveable cheesy pull.
• 1/2 cup mayonnaise: This is the Southern secret—mayo creates incredible richness!
• 1/2 teaspoon black pepper: For warm depth without overpowering the other flavors.
• 2 sleeves round butter crackers (such as Ritz), crushed: The finishing touch—these create the definitive golden, crunchy topping everyone loves.

Variations

This Classic Squash Casserole Recipe is a true chameleon; you can easily swap ingredients, adjust for allergies, or get creative with the flavor profile to suit your household’s tastes and needs.

• Gluten-Free: Simply substitute your favorite gluten-free butter crackers or crushed gluten-free cornflakes for the topping.
• Add Protein: Fold in shredded rotisserie chicken or cooked, crumbled sausage to turn this classic side into a satisfying main dish.
• Lighter Version: Replace the sour cream with Greek yogurt and opt for low-fat mayo or cheese to cut down on richness, if desired.
• Spicy Twist: Stir in a handful of diced jalapeños or a dash of cayenne for a gentle kick, or swirl in smoky paprika for extra depth.

How to Make Classic Squash Casserole Recipe

Step 1: Prep Your Baking Dish & Preheat

Start by preheating your oven to 350°F, then generously butter or spray a 2-quart baking dish. This not only prevents sticking but also gives you that lovely, golden crust along the edges of your casserole—absolutely worth the extra step!

Step 2: Sauté Squash and Onion

Melt a portion of your butter in a large skillet over medium-high heat. Add the sliced squash, chopped sweet onion, and about a teaspoon of salt. Cook, stirring frequently, until the veggies are tender and the liquid has mostly evaporated, about 10 minutes. This caramelization is key for deep, sweet flavor.

Step 3: Drain and Cool

Transfer the cooked veggies to a colander and let them drain for about five minutes. Press gently with the back of a spoon to coax out any extra moisture. This quick step helps prevent a watery casserole so your filling stays gloriously creamy.

Step 4: Mix the Filling

Gently combine the drained squash and onion with the beaten eggs, sour cream, grated cheddar, mayonnaise, remaining salt, and black pepper in a large bowl. Stir just until everything is blended—take care not to overmix, which can make the filling heavy.

Step 5: Assemble and Top

Pour the squash mixture evenly into your prepared baking dish. Melt the remaining butter, toss with the crushed butter crackers, and generously sprinkle this over the casserole. That beautiful buttery topping will bake up golden and crisp!

Step 6: Bake to Perfection

Slide the dish into your oven and bake for about 20 minutes, or until the topping is golden brown and the casserole is bubbling at the edges. Let it cool just a few minutes before serving—the aroma alone will have everyone rushing to the table!

How to Serve Classic Squash Casserole Recipe

Garnishes

Fresh herbs like chopped parsley or chives are lovely sprinkled over the bubbling casserole just before serving. A final dusting of cracked black pepper or even a light flutter of extra cheese adds visual charm and a pop of flavor.

Side Dishes

This Classic Squash Casserole Recipe is a natural with Southern favorites like roast chicken, ham, or fried catfish. For a well-rounded meal, pair it with fresh sliced tomatoes, collard greens, or a simple green salad on the side.

Creative Ways to Present

Try baking the casserole in individual ramekins for an elegant touch at brunches or spring dinners. Or, serve spoonfuls atop grilled chicken breasts as a homey-yet-gourmet “squash gratin” main course—they’ll never guess how easy it was!

Make Ahead and Storage

Storing Leftovers

Let leftover Classic Squash Casserole Recipe cool completely, then cover tightly or transfer to an airtight container. It keeps happily in the refrigerator for up to 3 days, and tastes just as cozy reheated.

Freezing

For best results, freeze the casserole before baking but after assembly (wait to add the cracker topping until baking day). Tightly wrap the dish; it’ll keep well for up to 2 months. Thaw overnight before baking and topping as usual.

Reheating

Gently reheat leftovers, covered with foil, in a 350°F oven until hot throughout (15-20 minutes works for small portions). Uncover for the last 5 minutes to re-crisp the cracker topping to golden perfection.

FAQs

Final Thoughts

Nothing brings the warm spirit of Southern comfort to your table quite like this Classic Squash Casserole Recipe. It’s easy to make, destined to get rave reviews, and always sparks a second helping—so don’t be surprised if it becomes a beloved tradition in your home, too. Give it a try soon and taste why this old-fashioned favorite never goes out of style!

Print