The squash sits on the counter all week, heavy and unassuming, and then one evening it becomes dinner. Roasted until sweet, blended into a cheddar sauce, and folded through hot pasta, it turns an ordinary weeknight into something the table actually notices. This is mac and cheese with a garden in it, and nobody misses the box.
Why This One Works
Roasting does what boiling cannot. Cubed squash roasted at 400°F caramelizes at the edges and concentrates its sweetness, so the purée tastes like squash instead of like water. Folded into a roux-based cheddar sauce, it thickens the sauce and colors it gold without turning the dish into soup.
The mustard is the quiet part. A half teaspoon of dry mustard sharpens the cheddar and keeps the sauce from tasting flat, the way a squeeze of lemon wakes up a soup. You will not taste mustard; you will taste better cheese.
Butternut Squash Mac and Cheese
Ingredients
Method
- Roast the squash. Peel, seed, and cube the squash (about 15 minutes). Heat the oven to 400°F. Toss the cubed squash with the olive oil, salt, and pepper, and spread it in a single layer on a parchment-lined baking sheet. Roast for about 30 minutes, flipping once halfway through, until the cubes are fork-tender and browned at the edges.
- Boil the pasta. While the squash roasts, bring a large pot of salted water to a boil. Cook the pasta for 8 to 10 minutes, until just shy of al dente, then drain, reserving 1/2 cup of the pasta water.
- Purée the squash. Transfer the roasted squash to a blender or food processor with 1/2 cup of the warmed milk and blend until completely smooth. If the purée is too thick to blend, add milk a splash at a time.
- Make the roux. In a large saucepan or Dutch oven, melt the butter over medium heat. Whisk in the flour and cook for about 1 minute, stirring constantly, until it smells nutty and turns lightly golden.
- Build the sauce. Whisk in the remaining warmed milk a little at a time until smooth, then stir in the dry mustard and nutmeg. Simmer gently for about 5 minutes, stirring often, until the sauce thickens enough to coat a spoon.
- Add the cheese and squash. Take the pan off the heat and stir in the squash purée, then add the shredded cheddar a handful at a time (about 5 minutes), stirring until each addition melts before adding the next. Season with salt and pepper to taste. If the sauce feels too thick, loosen it with a splash of the reserved pasta water.
- Combine. Fold the drained pasta into the sauce until every piece is coated. This makes 6 servings. Serve immediately, or continue to the optional bake.
- Optional bake. Heat the oven to 400°F. Transfer the mac and cheese to a buttered baking dish, top with the extra cheddar, and toss the panko with the olive oil and scatter it over the top. Bake for 15 minutes, until bubbling and golden. Let it rest for 5 minutes before serving.
Variations, Serving, and Storage
Swap half the cheddar for Gruyère if you want a nuttier, more grown-up sauce, or stir in a handful of torn sage leaves with the squash for an herbal note. Toasted breadcrumbs scattered over the top before the optional bake give the dish a crunch that the creamy pasta underneath needs. For a heartier plate, serve it alongside roasted vegetables or a simple green salad.
Leftovers keep three to four days in the refrigerator; reheat gently with a splash of milk, since the sauce tightens as it sits. The dish can also be assembled a day ahead, refrigerated, and baked the next day — add about 10 minutes to the bake time if it goes into the oven cold.
If squash season has you cooking from the garden in every direction, the same vegetable stars in butternut squash soup over the fire pit and beside roast acorn squash over the fire pit. And when the oven is already warm, a slice of apple cider doughnut loaf cake makes a fitting end to the meal.
Put it on the table straight from the pot, golden and steaming, and let the second helpings sort themselves out.
