Southern Yellow Squash Casserole

Ingredients

Equipment Needed

• •9x13-inch baking dish or 2-quart casserole
• •Large pot with lid or Dutch oven
• •Colander
• •Large mixing bowl

Instructions

1. 1

   Prepare the squash

   Trim the ends from your squash and slice into quarter-inch coins. Uniformity matters here because you want them to cook evenly. Pile the coins into a large pot or Dutch oven with a half cup of water and one teaspoon of salt. Cover tightly.

   Choose squash that are firm with glossy, unblemished skin. Avoid any larger than your forearm because the seeds become woody and bitter.
2. 2

   Steam until tender

   Set the pot over medium-high heat and cook until the squash is completely tender when pierced with a fork, about twelve to fifteen minutes. The coins should offer no resistance whatsoever. Undercooked squash refuses to meld into the casserole properly.

3. 3

   Drain thoroughly

   Drain the squash in a colander set over the sink. Press gently with the back of a spoon to encourage moisture release, but don't mash them into oblivion. Let them drain for at least ten minutes while you prepare the other components. This step is not optional. Waterlogged squash makes a soggy casserole.

   You can speed the draining by spreading the squash on a clean kitchen towel and rolling it gently to absorb excess liquid.
4. 4

   Sauté the onion

   While the squash drains, melt two tablespoons of butter in a skillet over medium heat. Add the diced onion and cook, stirring occasionally, until soft and translucent with golden edges, about eight minutes. The onion should be sweet, not brown. Season with the remaining half teaspoon of salt and the black pepper.

5. 5

   Build the filling

   Preheat your oven to 350°F. In a large mixing bowl, combine the drained squash with the sautéed onions. Add the beaten eggs, sour cream, one and a half cups of the grated cheddar, and the cayenne. Fold everything together until thoroughly combined. The mixture should look creamy and cohesive, speckled with cheese.

   The squash coins will break apart as you fold. This is exactly what you want. The texture should be somewhere between chunky and smooth.
6. 6

   Prepare the topping

   Melt the remaining two tablespoons of butter in a small saucepan or microwave. Crush the Ritz crackers in their sleeve using a rolling pin, or pulse briefly in a food processor. Toss the crumbs with the melted butter and the remaining half cup of cheese until everything is evenly coated.

7. 7

   Assemble the casserole

   Butter a 9x13-inch baking dish or a two-quart casserole. Spread the squash mixture evenly into the prepared dish. Scatter the buttered cracker topping over the surface in an even layer, pressing down gently. Every bite deserves its share of crunch.

8. 8

   Bake until golden

   Bake uncovered for forty to forty-five minutes, until the topping is deeply golden brown and the edges bubble with enthusiasm. The center should be set, not jiggly. A knife inserted in the middle should come out clean. Let rest for ten minutes before serving. This allows the custard to firm slightly and makes serving easier.

   If the top browns too quickly before the center sets, tent loosely with foil for the final fifteen minutes.

Chef Tips

• •Sharp cheddar is essential. Mild cheddar lacks the backbone to stand up to the squash and sour cream. If you want to experiment, a blend of sharp cheddar and Gruyère adds complexity without betraying the dish's humble origins.
• •Do not substitute low-fat sour cream. The casserole needs that butterfat to achieve proper richness. This is not diet food, and it never claimed to be.
• •Ritz crackers are traditional and should not be apologized for. Their buttery flavor and particular texture are part of what makes this dish what it is. Fancy alternatives miss the point entirely.
• •For a potluck, transport the casserole covered in foil. The topping will lose some crispness but can be revived under a hot broiler for two minutes at your destination.
• •Yellow squash and zucchini are not interchangeable here. Zucchini has a different texture and water content that changes the dish. Stick with yellow crookneck or straightneck varieties.

Advance Preparation

• •The casserole can be assembled completely, covered with plastic wrap, and refrigerated up to 24 hours before baking. Add ten to fifteen minutes to the baking time if cooking from cold.
• •For freezing, assemble without the cracker topping. Freeze for up to two months. Thaw overnight in the refrigerator, add the topping, and bake as directed.
• •The squash can be cooked and drained up to one day ahead. Store covered in the refrigerator. The onions can be sautéed at the same time. Combine and proceed with assembly when ready.

Frequently Asked Questions

Nutrition Information

1 serving (about 285g)