The More Cheeses, The Merrier In (and On!) This Yellow Squash Casserole (2024)

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Packed full of sweet yellow squash and topped with buttery crackers, this Southern staple is worth turning on the oven, even during the hottest summer days.

By

Amethyst Ganaway

The More Cheeses, The Merrier In (and On!) This Yellow Squash Casserole (1)

Amethyst Ganaway

Amethyst Ganaway is a food writer, chef, and restaurant industry veteran who focuses primarily on Southern and African-American foodways, and the foodways of the African Diaspora. She's a two-time Les Dames d'Escoffier International Legacy Culinary Award winner.

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Published August 21, 2023

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The More Cheeses, The Merrier In (and On!) This Yellow Squash Casserole (2)

In This Recipe

  • How to Prevent Waterlog

  • The More Cheeses, the Merrier

  • Topping It Off

Why It Works

  • Salting and sautéing the squash before baking helps to remove excess moisture and prevents the casserole from becoming watery.
  • Cream cheese and sour cream lend the filling richness and tang.
  • Tossing crushed crackers with butter and Parmigiano-Reggiano results in a satisfying and crunchy topping.

If you’ve ever grown zucchini or yellow summer squash, you know that summertime means one thing: an abundance of the gourd that feels impossible to keep up with. Sometimes all the zucchini bread in the world isn't enough to keep up with it. Enter the yellow squash casserole, a staple side dish of the Southern table that's especially popular at potlucks and holidays like Thanksgiving. Packed full of sweet yellow squash and topped with buttery crackers, it’s a Southern staple worth turning the oven on for, even during the hottest summer days.

I wish I could tell you that making a yellow squash casserole was as easy as tossing a bunch of ingredients into a casserole dish and baking it. But there’s a little prep work that needs to be done first to ensure you don't end up with flavorless, watery results.

The key to developing the squash's flavor and texture is to first salt it ahead of time to extract excess moisture (more on that below), and then sautée it with aromatics until just tender. Then there’s the creamy base—which comes together quickly in a bowl if you’re working with room-temperature ingredients—and a crunchy topping of crushed Ritz crackers tossed with melted butter and Parmigiano-Reggiano. Once you have all your components, all that’s left to do is assemble and bake.

How to Prevent Yellow Squash Casserole From Becoming Watery

Like its cousin zucchini, yellow squash is almost entirely water! To avoid a mushy, flavorless mess, it helps to first salt the squash, which draws out excess moisture through osmosis. This not only speeds up the cooking process, but also helps to concentrate the squash’s flavor. After a quick dab with paper towels to dry the squash, the squash is pre-cooked in a skillet, helping to further reduce moisture, soften the squash, and develop its inherently sweet flavor.

Building Flavor: The More Cheeses, the Merrier

Take a look at many squash casserole recipes, and you’ll see that most call for one or more of the following: whole milk, heavy cream, sour cream, cream cheese, or mayonnaise, along with eggs and either grated cheddar or mozzarella cheese. Here, I’ve gone with sour cream and cream cheese, which lends the casserole richness and tang, along with two eggs and a combination of grated cheddar, mozzarella, and, for the topping, Parmigiano-Reggiano. The resulting casserole feels more like your favorite baked macaroni and cheese—except it’s stuffed full of summer squash instead of pasta.

Topping It Off

Here comes the fun part: crushing up Ritz crackers in a zip-top bag with a rolling pin. After you’ve turned the crackers into crumbs, all that’s left to do before baking is a quick toss with melted butter, Parmigiano-Reggiano, and some freshly ground pepper. Sprinkled evenly on top of your squash casserole before baking, the crushed crackers provide a much-needed and satisfying crunch.

The More Cheeses, The Merrier In (and On!) This Yellow Squash Casserole (4)

Recipe Details

Yellow Squash Casserole

Prep60 mins

Cook60 mins

Cooling30 mins

Total2 hrs 30 mins

Makes6to 8 servings

Ingredients

  • 2 1/2 pounds yellow squash (about 3 to 4 medium squash; 1135g), cut into 1/4-inch coins
  • Kosher salt
  • 7 tablespoons unsalted butter (3 1/2 ounces; 98g), divided
  • 1 medium yellow onion (8 ounces; 227g), chopped
  • 2 medium cloves garlic, minced
  • 1/3 cup sour cream, at room temperature (2 3/4 ounces; 75g)2 large eggs
  • 2/3 cup cream cheese, at room temperature (5 1/4 ounces; 150g)
  • 3/4 cup shredded cheddar cheese (3 ounces; 85g)
  • 1/2 cup shredded mozzarella cheese (2 ounces; 57g)
  • For the Topping:
  • 2 tablespoons unsalted butter (1 ounce; 28g), melted
  • One 3.4-ounce sleeve Ritz crackers, crushed (32 crackers; 96g)1/2 cup grated Parmigiano-Reggiano (1 ounce; 28g)
  • Freshly ground black pepper

Directions

  1. In a large colander, sprinkle yellow squash with 2 teaspoons kosher salt, tossing to evenly coat. Let stand for 30 minutes, then pat squash dry with paper towels.

    The More Cheeses, The Merrier In (and On!) This Yellow Squash Casserole (5)

  2. Adjust oven rack to middle position and preheat oven to 350ºF (180ºC). Lightly grease a 2 1/2-quart baking dish with unsalted butter and set aside.

    The More Cheeses, The Merrier In (and On!) This Yellow Squash Casserole (6)

  3. In a 10-inch nonstick pan or cast iron skillet set over medium-low heat, melt 1 tablespoon butter. Add onion and garlic and cook until softened, about 4 minutes. Scrape onto a plate and set aside. Melt remaining 3 tablespoons butter in skillet and, working in batches to avoid crowding the pan, add the squash and cook, stirring to coat in butter, until squash begins to soften around the edges, about 5 minutes. Continue cooking until squash is tender, about 8 minutes. Transfer cooked squash to a bowl and set aside. Repeat with remaining squash, adding 2 tablespoons butter for each additional batch.

    The More Cheeses, The Merrier In (and On!) This Yellow Squash Casserole (7)

  4. In a large bowl, whisk together sour cream, eggs, and cream cheese until well-combined. Using a silicone spatula, fold in the cheddar and mozzarella. Drain cooked squash of any pooled liquid, then add to sour cream mixture with reserved onion and garlic. Season to taste with salt and pepper. Pour squash mixture into prepared baking dish and set aside.

    The More Cheeses, The Merrier In (and On!) This Yellow Squash Casserole (8)

  5. For the Topping: In a medium bowl, toss crushed Ritz crackers with the melted butter. Stir in the Parmigiano-Reggiano and a few cracks of freshly ground pepper until well combined. Sprinkle cracker mixture over the squash mixture, then bake until golden brown and bubbling, about 1 hour.

    The More Cheeses, The Merrier In (and On!) This Yellow Squash Casserole (9)

Special Equipment

Large colander, 2 1/2 quart baking dish, 10-inch sauté pan, silicone spatula

Make-Ahead and Storage

The assembled casserole can be made up until step 5 and kept in the refrigerator for up to two days. When ready to finish, allow the casserole to come to room temperature, top with Ritz mixture, and bake until golden brown and bubbling, about 1 hour.

The More Cheeses, The Merrier In (and On!) This Yellow Squash Casserole (2024)

FAQs

How do you keep squash casserole from getting watery? ›

Salting and sautéing the squash before baking helps to remove excess moisture and prevents the casserole from becoming watery. Cream cheese and sour cream lend the filling richness and tang. Tossing crushed crackers with butter and Parmigiano-Reggiano results in a satisfying and crunchy topping.

How do you make Paula Deen's squash casserole? ›

In separate medium size skillet, sauté the sliced onion in butter for 5 minutes. Remove from pan and, using a large bowl, add squash, onions, sour cream, Paula Deen's House Seasoning and sharp cheddar cheese. Pour mixture into a buttered casserole dish and top with cracker crumbs. Bake for 25 to 30 minutes.

What is squash casserole made of? ›

The Southern classic combines fresh squash and onion with a creamy sauce and a crunchy cracker-Cheddar cheese topping. Whether you serve this squash casserole as a flavorful side or a veggie-centric main dish, everyone will be begging you to make it again and again for family gatherings, potlucks, and holidays.

How many squash for 4 cups? ›

Stack and slice, then make crosswise cuts into cubes: If you are cubing the squash, lay the slices down (you can stack a few at a time) and make another set of lengthwise cuts. Then make crosswise cuts to make cubes. One 1 1/2 pound butternut squash will yield approximately 4 cups of 1/2-inch cubed squash.

How do you thicken runny casserole? ›

Make sure you mix a solution of cornstarch and water cold, and then add it to your hot dish. Same can be said for flour. A flour and water paste (desk or wasteland spoon of flour then upload cold water until it is a liquid paste) delivered to the casserole will thicken it.

How do you keep a casserole moist? ›

Covering a casserole helps the dish cook evenly, stay moist, and prevents burning. Uncovering helps with browning, crisping and allowing for steam to release.

What is the best squash to cook with? ›

Butternuts are the ideal "ingredient" squash. While they are perfectly fine roasted on their own with a little butter and salt, their smooth, moist texture and uncomplicated sweetness make them the perfect base for pies, soups, curries — you name it, butternuts can adapt to the recipe.

Why is my baked squash watery? ›

Too much salt may draw out more moisture than you want, and excess olive oil can make baked spaghetti squash soggy. Don't Add Water.

How do you cook squash so it doesn't get soggy? ›

Roasting zucchini at a high temperature instead of baking or sautéing helps develop browning and a slight char on the outside, which keeps it from getting soggy. It also concentrates the flavors, giving this subtle veg a little more oomph.

What is the main ingredient in a casserole? ›

In the United States, a casserole or hot dish is typically a baked food with three main components: pieces of meat (such as chicken or ground meat) or fish (such as tuna) or other protein (such as beans or tofu), various chopped or canned vegetables (such as green beans or peas), and a starchy binder (such as flour, ...

What are the four components to a casserole? ›

Not every single casserole has all of them, but as a rule of thumb, here's what to look for: a starch, a binding agent or sauce, and a protein or vegetable. Many casseroles also have both vegetables and proteins, as well as a crunchy element to give some textural contrast, and cheese.

Why cook squash cut side down? ›

Putting it cut-side down creates a sort-of steam chamber for the flesh, helping it cook faster and retain moisture (no dried out squash here!).

How many cups is 2 lbs of squash? ›

How Many Cups are in a Pound?
Asparagus1 pound = 3 cups chopped
Pumpkin1 pound = 4 cups chopped = 2 cups cooked and drained
Spinach1 pound = 3/4 to 1 cup cooked
Squash (summer)1 pound = 4 cups grated = 2 cups salted and drained
Squash (winter)2 pounds = 2-1/2 cups cooked and pureed
19 more rows
Apr 29, 2024

How many squash does it take to make 2 lb? ›

Yellow squash: you'll need a total of about 6 cups sliced, or about 2 lbs. That is equivalent to about 4 small yellow squash or 2 bigger squash. I prefer small squash, if available, because they are typically more flavorful, tender, and have smaller seeds.

How many squash are 2 cups cooked? ›

The same 1½ reduction occurs during the cooking process; 2 cups raw slices would shrink to 1 cup cooked yellow squash on your plate. Or, either 1 medium straightneck or crookneck squash would yield about ¾ cup of cooked squash. Yellow crookneck and straightneck squash is related to pumpkins, cucumbers and melons.

How do you make squash less watery? ›

Before cooking sprinkle salt on the cut sides and let sit for 15 minutes. You will be surprised how much water comes out. Pat dry and then bake!

How to reduce liquid in a casserole? ›

Corn starch is a good way to thicken up the water into something more saucy. This is my preferred method if the extra water actually has flavor, because it adds a nice sauciness to the dish. Make a corn starch 'slurry' by mixing cold water and some corn starch, then add that to the hot dish that still cooking.

How do you keep squash and zucchini from getting soggy? ›

Salt and drain zucchini

If you've got the time, try salting and draining your zucchini. This method involves liberally salting your sliced zucchini and allowing it to set in a colander (over a bowl) for at least 30 minutes, up to an hour, before patting dry with paper towels or a tea towel.

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