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Spicy Roasted Butternut Squash Soup with Warm Aromatics

Spicy roast butternut squash soup is the perfect comfort food for chilly autumn days. It’s simple to make, full of warming flavour, and freezes well for quick meals later.

Flat lay view of spicy roast butternut squash soup with a spoon in a blue bowl set on a blue plate with a dark blue linen napkin on the side. Set on a teal backdrop, there's also a board with sliced bread, a pot with croutons and two soup spoons in the background.

When I was little I only ate tomato soup — nothing else. Boring, I know, but I’ve since expanded my tastes and now love richer, roasted vegetable soups. Roasting butternut squash brings out a sweet, caramelised flavour that other cooking methods can’t match.

Front view of a bowl of spicy roast butternut squash soup with a hand holding up a spoon filled with soup above it set over a plate. There is a dark blue linen napkin, some books stacked up at the back, two halves of a butternut squash and some bread in the background. Set on a teal backdrop.

This version includes a hint of rosemary for earthiness and a touch of chilli to give it a gentle, warming kick. If you prefer set-and-forget cooking, a slow-cooker pumpkin or squash soup is an easy alternative for busy weeknights.

Distanced front view of someone holding half a butternut squash against a teal backdrop. There is a dark blue linen napkin scrunched up and a pot of croutons in the background.

How to make spicy roast butternut squash soup – recipe summary

  1. Toss cubed squash with chilli flakes, oil and seasoning, then roast for 15–20 minutes.
  2. Add onion, garlic and rosemary and roast a further 10 minutes.
  3. Blend with vegetable stock and cream until smooth.
  4. Heat, season to taste and serve.
Flat lay view of spicy roast butternut squash soup with a spoon in a blue bowl set on a blue plate with a dark blue linen napkin on the side. Set on a teal backdrop, there are a few chilli flakes and breadcrumbs scattered in the background.

Ingredients

Everything you need for this recipe is below. Quantities are included in the detailed recipe further down.

  • Butternut squash – A medium squash works well (mine weighed about 1150g whole). Substitute another winter squash if needed.
  • Chilli flakes – Easy to add heat without chopping fresh chillies.
  • Oil – Olive oil adds subtle flavour; butter or another savoury oil will also work.
  • Onion – A medium yellow onion is ideal.
  • Garlic – Use full-size cloves for good flavour.
  • Rosemary – Fresh rosemary is best for its bright, earthy notes.
  • Stock – Vegetable stock keeps it vegetarian; chicken stock is fine if preferred.
  • Cream – Double/heavy cream gives richness; replace with extra stock for a dairy-free version.
Someone reaching in a saucepan of butternut squash soup with a metal soup spoon set against a teal backdrop. There are drips of soup down the side of the pan, half a butternut squash, a pot of croutons and a blue linen napkin in the backgtround.

Recipe tips

  • To peel a squash: trim the top and bottom, cut the neck from the bulb, stand the pieces upright and remove the skin with a knife or peeler. Halve, scoop out seeds and cube.
  • Veggie shapes don’t need to be perfect since everything is blended.
  • Season vegetables generously before roasting for better flavour.
  • Adjust chilli flakes to taste: 1/2 tsp mild, 1 tsp medium, 1.5–2 tsp for more heat.
  • For a vegan or dairy-free soup, use an extra 100ml of vegetable stock instead of cream.
  • If the soup is too thick, thin with more stock until it reaches your preferred consistency.
  • Use a high-quality blender for a smooth, velvety texture.
Flat lay view of spicy roast butternut squash soup with a spoon in a blue bowl set on a blue plate with a dark blue linen napkin on the side. Set on a teal backdrop, there's also a board with sliced bread, a pot with croutons, a squash and a pan with more soup in the background.

Spicy Roast Butternut Squash Soup – Step by Step

(Printer-friendly recipe card is below)

This recipe includes UK metric and US cup measurements.

Ingredients (serves 3)

  • 1 butternut squash, peeled and cubed (mine weighed 1150g whole)
  • 1 tsp chilli flakes* (see notes)
  • 2 tbsp olive oil
  • Salt & pepper
  • 1 onion, peeled and sliced
  • 3 garlic cloves, roughly chopped
  • 1 tbsp fresh rosemary, chopped
  • 500ml (2 cups + 1 tbsp) vegetable stock
  • 125ml (1/2 cup) double/heavy cream

*Use 1/2 tsp for mild heat, 1 tsp for a medium kick, 1.5–2 tsp for spicier soup.

Essential equipment

  • Roasting pan
  • Blender or food processor

Instructions

1. Preheat oven to 190ºC (Fan 180ºC / 374ºF). In a roasting pan combine the cubed squash, chilli flakes, olive oil, and a generous pinch of salt and pepper. Toss well.

Butternut squash cubes in a roasting pan mixed with oil, chilli flakes and seasoning. Set on a kitchen worktop.

2. Roast for 15–20 minutes until the squash is tender and starting to brown.

Roasted cubes of butternut squash that have been seasoned with chilli flakes in a roasting pan. Set on a kitchen worktop.

3. Add the sliced onion, chopped garlic and chopped rosemary to the pan. Season again with a little salt and pepper and stir to coat everything.

Cubes of butternut squash roasted with chilli flakes in a roasting dish. Sliced onion and garlic has been added to the pan. Set on a kitchen worktop.

4. Return to the oven for 10 minutes until the onions are soft and fragrant.

5. Allow the roasted vegetables to cool for 10–15 minutes. Transfer them to a blender with the vegetable stock and cream. Blend until completely smooth, working in batches if necessary. Taste and adjust seasoning.

Spicy roast butternut squash ingredients in a blender set on a kitchen worktop.

6. Reheat the soup gently in a saucepan if serving immediately. The texture should be smooth and velvety.

Blended spicy roast butternut squash in a glass bowl on a kitchen worktop.

How to store butternut squash soup

Keep the soup covered in the fridge for up to 3 days. It freezes well for up to 3 months — thaw in the fridge and reheat gently on the stove.

A hand reaching in to slice a loaf of sourdough bread with a bread knife on a dark wood chopping board. All set against a teal backdrop, there's also half a butternut squash, a pot of croutons, a deep blue linen napkin, chilli flakes and breadcrumbs in the background.

Why roast squash before making soup?

Roasting develops sweetness and caramelisation while softening the squash for easy blending. The result is a richer flavour and a smoother texture than boiling alone.

Front view of a bowl of spicy roast butternut squash soup with a spoon in it set over a plate. There is a dark blue linen napkin, some books stacked up at the back, two halves of a butternut squash and some bread in the background. Set on a teal backdrop.

Do you have to peel butternut squash?

Peeling isn’t strictly necessary — you can roast halves and scoop out the flesh — but peeling and cubing speeds up cooking and makes the process easier.

Close up front view of someone holding half a butternut squash against a teal backdrop. There is a dark blue linen napkin scrunched up in the background.

What pairs well with butternut squash soup?

Crusty bread and butter are classic. Cheese on toast, sourdough, or even a bacon sandwich make excellent dippers.

Someone stirring with a wooden spoon in a saucepan of butternut squash soup set against a teal backdrop. There are drips of soup down the side of the pan, half a butternut squash, a pot of croutons and a blue linen napkin in the backgtround.

Recipe card

Flat lay view of spicy roast butternut squash soup with a spoon in a blue bowl set on a blue plate with a dark blue linen napkin on the side. Set on a teal backdrop, there's also a board with sliced bread, a pot with croutons and a pan with more soup in the background.

Spicy Roast Butternut Squash Soup Recipe

Yield:
3
Prep Time:
20 minutes
Cook Time:
25 minutes
Total Time:
45 minutes

Velvety, earthy and warming — a winter-ready soup that’s easy to prepare and full of flavour.

Ingredients

  • 1 x Butternut Squash, peeled and cubed
  • 1 tsp Chilli Flakes *
  • 2 tbsp Olive Oil
  • Salt & Pepper
  • 1 x Onion, peeled and sliced
  • 3 x Garlic Cloves, peeled and roughly chopped
  • 1 tbsp Fresh Rosemary, chopped
  • 500ml (2 Cups + 1 tbsp) Vegetable Stock
  • 125ml (1/2 Cup) Double/Heavy Cream

Essential Equipment

  • Roasting Pan
  • Blender/Food Processor

Instructions

  1. Preheat oven to 190ºC/Fan 180ºC/374ºF. Mix squash, chilli flakes, olive oil and salt and pepper in a roasting pan.
  2. Bake 15–20 minutes until softened and beginning to brown.
  3. Add onion, garlic and rosemary, season and mix well.
  4. Bake a further 10 minutes until tender.
  5. Cool 10–15 minutes, then blend vegetables with stock and cream until very smooth, working in batches if necessary.
  6. Taste and adjust seasoning, then reheat gently to serve.

Notes

My squash weighed 1150g/40.5 oz whole.

Chilli flakes: 1/2 tsp mild, 1 tsp medium, 1.5–2 tsp for hotter soup.

Storage

Refrigerate covered for up to 3 days or freeze for up to 3 months. Thaw in the fridge and reheat on the stove.

Tips

  • Peel and cube the squash for faster cooking.
  • Season before roasting for better depth of flavour.
  • Use a good blender for a silky texture.
  • For dairy-free, replace cream with an extra 100ml of stock.
Nutrition Information:

Yield: 3
Serving Size: 1

Amount Per Serving:
Calories: 280Total Fat: 25gSaturated Fat: 11gTrans Fat: 1gUnsaturated Fat: 12gCholesterol: 48mgSodium: 591mgCarbohydrates: 14gFiber: 3gSugar: 5gProtein: 3g

Nutritional information is a guideline only.

© Emma Mason | Kitchen Mason
Cuisine: English
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Category: Easy Soup Recipes

Have you made this recipe?

If you try this spicy roast butternut squash soup I’d love to hear how it went. Share photos, comments or questions on social channels or email me at [email protected].