Squash Casserole

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Squash casserole brings warmth, nostalgia, and rich Southern flavor to almost any dinner table. At once creamy and crisp, this beloved side dish transforms humble yellow squash into something comforting, delicious, and versatile. Whether you’re planning a weeknight meal or holiday feast, squash casserole offers a satisfying blend of textures and flavors that invites everyone back for seconds.

Why Squash Casserole Stands Out

Few side dishes balance ease, comfort, and flavor quite like squash casserole. At its heart, the dish celebrates garden-fresh yellow squash (or zucchini) enveloped in a creamy cheese sauce and finished with a buttery, crisp cracker topping. The base is mild and tender, making it the perfect canvas for bold, savory edges.

What makes squash casserole special? It adapts easily to fit any gathering. You can serve it with roast chicken, pork chops, grilled fish, or even as the star alongside other vegetarian fare. Its crowd-pleasing appeal, make-ahead convenience, and simple ingredients solidify its reputation as a go-to dish. Plus, leftovers reheat beautifully, so nothing goes to waste.

Ingredients You Need

Here’s what you’ll need to create the best squash casserole, with options to tailor the recipe to your preferences:

• Yellow squash (about 2 pounds): Use fresh, firm squash with the skin on for extra color and texture.
• Onion: One medium onion adds sweet and savory depth.
• Butter: Essential for sauteing and creating that golden topping.
• Sour cream: Delivers tang and a velvety base for the sauce.
• Mayonnaise: Blends with sour cream for a creamy, smooth filling.
• Cheddar cheese: Sharp cheddar melts into the squash, adding body and flavor.
• Parmesan cheese: A few tablespoons heighten the savory bite.
• Egg: Binds everything together and gives structure to each forkful.
• Garlic powder, salt, black pepper: Elevate and balance the other flavors.
• Crushed buttery crackers (such as Ritz): Create the signature crisp topping.
• Fresh parsley or chives: Add a pop of color and brightness to finish.

Ingredient Variations
– Swap in zucchini or a mix of summer squash for variety.
– Use Greek yogurt instead of sour cream for added protein and tang.
– Mix in diced red bell pepper or scallions for extra color.
– Substitute a bit of Monterey Jack or mozzarella cheese for a different twist.

Equipment Needed

You won’t need any special equipment—just basic kitchen tools:

• Large skillet
• Mixing bowls
• 9×13-inch baking dish (or a similar casserole dish)
• Sharp knife and cutting board
• Measuring cups and spoons
• Wooden spoon or spatula

Step-by-Step Instructions

Here is a detailed guide to making a classic squash casserole from scratch.

1. Prepare the Baking Dish

Set your oven to 350°F and grease your baking dish with butter or cooking spray. This helps prevent sticking and gives the casserole a golden edge.

2. Slice and Sauté the Vegetables

• Wash and trim the squash. Slice it into 1/4-inch rounds.
• Dice the onion.
• Melt half of the butter in your skillet over medium heat.
• Add the squash and onion. Sprinkle salt, pepper, and garlic powder over the vegetables.
• Sauté for about 8 to 10 minutes. The squash should soften while retaining a bit of bite. Stir occasionally to avoid browning.
• If you notice excess moisture, tip the skillet slightly and spoon off some liquid, or lay the cooked squash on paper towels to drain.

3. Mix Together the Filling

• In a mixing bowl, combine sour cream, mayonnaise, beaten egg, cheddar, and half the parmesan cheese.
• Stir until you get a smooth, rich base.
• Fold in the cooked squash and onions. Mix with a gentle hand to avoid breaking up the squash slices.

4. Assemble the Casserole

• Pour the filling into the greased baking dish.
• In a separate bowl, mix crushed crackers with the remaining melted butter and rest of the parmesan.
• Sprinkle the cracker mixture evenly across the top.

5. Bake

• Slide the dish into the preheated oven.
• Bake for 25 to 30 minutes, or until the casserole is bubbling and the top is golden brown.
• If you like an extra-crisp topping, broil for 1 to 2 minutes at the end, keeping a close eye to prevent burning.

6. Garnish and Serve

• Remove from the oven and let stand for 5 minutes.
• Scatter chopped fresh parsley or chives over the top before serving.

Tips for the Perfect Casserole

• Uniform slices: Evenly-cut squash cooks consistently and creates an appealing texture.
• Don’t overcook the squash: Slight firmness keeps the casserole from going mushy.
• Reduce moisture: Squash releases a lot of water during cooking. Allow it to drain or use a slotted spoon to add it to the filling.
• Freshly-grated cheese: Melts better than pre-shredded cheese, which often has anti-caking agents.
• Assemble ahead: Prepare everything except the cracker topping a day in advance. Add the topping just before baking for optimal texture.
• Try panko: Mix some panko breadcrumbs with the crackers for an even crunchier topping.
• Flavor twists: Stir in crumbled cooked bacon or a pinch of cayenne for extra dimension.

Serving Suggestions

Squash casserole’s mild, creamy character makes it the perfect side for many meals. Here are some pairing ideas:

You can also serve the casserole as a centerpiece for a vegetarian meal by adding a protein-packed grain salad or hearty bean dish.

Storing and Reheating Leftovers

Squash casserole stands up well to storage and reheating. Here’s how to keep it tasting fresh:

• To Store: Cool the casserole to room temperature. Cover tightly or transfer to an airtight container. Refrigerate for up to four days.
• To Freeze: Freeze the baked and cooled casserole in a freezer-safe dish. Wrap in a layer of plastic, then foil. To serve, thaw overnight in the fridge and reheat.
• To Reheat: Reheat in a covered baking dish at 350°F for 15 to 20 minutes. For single portions, use the microwave for 1 to 2 minutes.

Tip: If the topping softens during storage, reheat uncovered for the last few minutes to revive its crispness.

Common Questions

What if I don’t have Ritz crackers?

Use any type of buttery cracker you have on hand. Panko, seasoned breadcrumbs, or even crushed cornflakes work in a pinch.

Can I make this gluten-free?

Yes—try gluten-free crackers or panko for the topping.

Is it possible to prep the casserole ahead?

Absolutely. Assemble everything except the topping one day ahead. Refrigerate, then add the cracker topping just before baking.

Squash casserole promises comfort and versatility, whether you’re serving it for a special celebration or a quiet family dinner. With its melting layers of cheese, tender squash, and crispy topping, it delivers flavor and satisfaction every time. Try it once, and it may just become a new classic in your own home.