Roasted Butternut Squash Soup
To make roasted butternut squash soup, halve a squash, scoop the seeds, and roast it cut-side down at 200 °C for about 40 minutes until soft and caramelized — roasting is what gives the soup its deep, sweet flavour. Sauté onion and garlic, scoop in the roasted squash flesh, add stock, and simmer briefly. Blend until silky, season with salt and a little nutmeg, and finish with a swirl of cream. It freezes well, so make a double batch.
The first cool evening of the year is a butternut squash soup evening. Roasting the squash first is the whole secret — it turns a mild vegetable into something deep, sweet, and nutty, and the rest is just onion, garlic, and stock. It’s cozy, it’s cheap, and it freezes like a dream.
Roast, don’t boil
Boiled squash makes watery, flat soup. Roasted squash makes soup with real depth, because roasting caramelizes the sugars and concentrates the flavour. Halve the squash, scoop the seeds, rub with oil, and roast cut-side down until the flesh is soft and the edges are golden. Then you just scoop it out — no peeling raw squash and losing a knuckle.
Building the soup
Soften onion and garlic, add the roasted flesh and stock, and simmer just long enough to marry everything. Blend until completely silky — an immersion blender is easiest, but an upright blender gives the smoothest result (let it cool a little and vent the lid).
Season simply: salt, pepper, and a little nutmeg, which loves squash. A swirl of cream at the end makes it velvety, but it’s excellent without.
Make it yours
- Curried: bloom 1 tbsp curry powder or a spoon of Thai curry paste with the onion; finish with coconut milk instead of cream.
- Apple: roast a cored apple alongside the squash for a sweet-tart note.
- Spiced: a pinch of cinnamon, ginger, or chili.
- Toppings: toasted squash seeds, crispy sage, croutons, or a drizzle of brown butter.
Make a double batch and freeze half — a jar of this in the freezer is a 10-minute lunch on a grey November day.
Frequently asked questions
Why roast the squash instead of boiling it?
Roasting caramelizes the squash's natural sugars and drives off water, so the soup tastes deeper, sweeter, and nuttier — not watery. Boiling is faster but gives a flatter, more one-note result. The extra 40 minutes in the oven is hands-off and worth it.
Can I freeze butternut squash soup?
Yes, beautifully — it's one of the best soups to freeze. Cool it completely and freeze in portions for up to 3 months. If you've added cream, the texture can separate slightly on thawing; just reheat gently and whisk, or add the cream fresh when you reheat.
What can I use instead of butternut?
Any dense winter squash works — buttercup, hubbard, kabocha, or sugar pumpkin all roast and blend well. Avoid stringy spaghetti squash. A mix of squash and a roasted carrot or sweet potato is lovely too.