This 4-ingredient squash casserole is the kind of economical summer supper side that came out of church cookbooks, backyard gardens, and practical home kitchens across the South and Midwest. When yellow squash is abundant, this recipe turns a humble vegetable into something rich, savory, and deeply comforting, with just enough cheese and buttery cracker topping to make the soft baked squash feel like a complete treat.
Serve it alongside fried chicken, baked ham, meatloaf, pork chops, or simple grilled burgers when you want an easy vegetable side that still feels hearty. It also works well with sliced tomatoes, green beans, a crisp cucumber salad, or fresh fruit at a summer table, and leftovers are especially good with scrambled eggs or a plain roasted chicken the next day.
4-Ingredient Squash Casserole
Servings: 6
Ingredients
4 medium yellow squash, sliced into thin rounds
1 sleeve buttery round crackers, crushed
2 cups shredded cheddar cheese
4 tablespoons butter, melted
Directions
1. Preheat the oven to 350°F and lightly butter a medium glass baking dish.
2. Place the sliced squash in a large skillet with a splash of water, cover, and cook over medium heat for 8 to 10 minutes until just tender. Drain well so the casserole does not turn watery.
3. In a mixing bowl, combine the drained squash with 1 1/2 cups of the cheddar cheese and about half of the crushed crackers. Stir gently so the squash stays mostly intact.
4. Spread the mixture into the prepared baking dish. Top with the remaining cheddar cheese, then the rest of the crushed crackers, and drizzle the melted butter evenly over the top.
5. Bake for 25 to 30 minutes, until bubbling around the edges and golden brown on top. Let it rest for 5 to 10 minutes before serving.
Variations & Tips
Drain thoroughly: Squash holds a lot of water, so after cooking it on the stove, let it sit in a colander for a few minutes or press lightly with the back of a spoon. That one step keeps the casserole creamy rather than loose.
Make it more seasoned: Even though the classic 4-ingredient version keeps things simple, a pinch of black pepper or a little onion cooked with the squash fits naturally if you want a bit more savory depth without changing the spirit of the dish.
Try a different cheese: Sharp cheddar gives the most traditional flavor, but Colby, Monterey Jack, or a cheddar blend all melt well and can make the casserole a little milder or creamier depending on what you have on hand.
Use zucchini for part of the squash: If the garden is producing both, replace up to half the yellow squash with sliced zucchini. The finished casserole will look a little greener and have a slightly firmer texture.
Make ahead tip: Assemble the casserole a few hours ahead, cover, and refrigerate. Add the butter just before baking so the cracker topping stays as crisp and golden as possible.