Roasted Squash and Sage Soup with Brown Butter Croutons

Every autumn I buy more squash than any reasonable household can eat. They pile up on the counter — delicata, acorn, a couple of big butternuts — and for a few weeks they're decoration, and then they're dinner. This soup is what happens when I finally roast the last of them. It's simple, deeply flavored, and the kind of thing that makes a Tuesday feel like a Sunday.

You can use any winter squash you like here, but butternut and kabocha give the silkiest texture. I roast rather than boil because roasting concentrates the sugars and gives you caramelized edges that make the soup taste like more than the sum of its parts. Halve the squash, scoop the seeds, rub the cut sides with olive oil and a little salt, and roast cut-side down at 425 degrees until a knife slides in with no resistance. Depending on size, that's anywhere from thirty-five to fifty minutes. Let it cool enough to handle, then scoop the flesh out.

Building the Base

While the squash roasts, I start the aromatics. A diced onion and a couple of ribs of celery in a heavy pot with butter, cooked low and slow until they're soft and sweet, not browned. Add a few cloves of garlic near the end so they don't burn. Once the squash is in, cover everything with good stock — chicken or vegetable, whatever you have — and simmer for twenty minutes to let the flavors marry. A sprig of thyme goes in, and a bay leaf if you keep them.

Then blend. An immersion blender is the easiest tool, but a stand blender gives you a smoother result if you're willing to work in batches. Add a splash of cream or a can of coconut milk at the end, and taste for salt. Squash needs more salt than you think — undersalted squash soup tastes flat and sweet in a way that no amount of pepper can fix. I keep adding pinches until it tastes like itself.

The Brown Butter and Sage

This is the part that turns it into something worth writing down. In a small skillet, melt a few tablespoons of butter over medium heat and let it go until the milk solids turn golden and it smells nutty — about three minutes. Then drop in a handful of fresh sage leaves and let them crisp for thirty seconds. They'll sputter and darken and smell like the best version of autumn. Pour the whole thing over the soup right before serving, or spoon it into each bowl at the table.

For croutons, tear a crusty loaf into rough chunks, toss with olive oil and salt, and toast in a hot oven until they're crisp outside and still a little chewy within. Day-old bread is perfect here.

I've served this soup at Thanksgiving alongside the turkey, and I've eaten it alone on a Sunday night with nothing but a blanket and a book. It works both ways. If you have a squash on the counter doing nothing, this is what to do with it.