Butternut Squash Leek Soup

Ingredients

• 1 butternut squash (about 1.65 litres / 7 cups of chunks)peeled, deseeded and cut into 5 cm chunks
• 30 ml (2 tablespoons)olive oil or butter
• 1 large or 2 smallleek, white and green parts only, quartered lengthways, thinly sliced and thoroughly washed
• 946 ml (4 cups)chicken stock or vegetable stock
• 240–480 ml (1–2 cups)water
• 2 sprigsfresh thyme
• 1bay leaf
• ½ teaspoonsalt
• ¼ teaspooncayenne pepper

Instructions

1. 1

   Microwave the squash

   Put the peeled, deseeded squash chunks in a large microwave-safe glass bowl. Cover with cling film and microwave for 15 minutes.

2. 2

   Soften the leek

   Meanwhile, heat the olive oil or butter in a pan over medium heat. Add the leek and cook until softened, about 5 minutes.

3. 3

   Brown the squash

   Reserve the liquid released by the squash. Add the squash to the pan with the leek and cook for about 10 minutes, stirring occasionally, until browned bits form on the bottom. Take care not to let them burn.

4. 4

   Simmer the soup

   Pour in the stock and scrape the browned bits from the bottom of the pan. Add the thyme, bay leaf, cayenne and reserved squash liquid, then bring to a simmer. Simmer for about 10 minutes, until the leek is fully tender.

5. 5

   Blend until smooth

   Remove the bay leaf and thyme sprigs. Blend the soup in a high-speed blender or with a stick blender. Add water 120 ml (½ cup) at a time until it reaches your preferred consistency.

6. 6

   Season and serve

   Taste and adjust with salt and more cayenne, then serve.

What is butternut squash leek soup?

This is a smooth, savoury soup built around sweet winter squash and mild alliums. It fits the cosy style of American home cooking, where a few pantry staples turn seasonal vegetables into a simple meal.

Microwaving the squash first shortens its time in the pan, while browning it with the leek adds savoury depth before the stock goes in. Blending brings the vegetables together into a silky texture.

Nutrition and macros by portion

The nutrition label shows one serving as written: 247 calories, 8g protein, 34g carbs, 10g fat.

The squash and any bread served alongside it provide most of the carbohydrates; olive oil or butter contributes fat, while the stock supplies some protein. Pair a bowl with a protein-rich side such as beans or a sandwich to make the meal more filling.

The key ingredients

Squash: Peel, deseed and cut it into evenly sized chunks so it softens consistently in the microwave. Keep the liquid it releases; it goes into the soup later.

Leek: Use the white and green parts, sliced thinly and washed well, as grit can hide between the layers. Cooking it gently softens its flavour before the squash is added.

Stock: Chicken stock gives the soup a fuller savoury base, while vegetable stock keeps it meat-free. Either works with the squash and herbs.

Build flavour in the pan

Soften the leek over medium heat for about 5 minutes, then add the microwaved squash. Stir occasionally as the squash browns for about 10 minutes.

Those browned bits on the pan are useful flavour, but they should not turn black. Pour in the stock and scrape them up before simmering.

Check the texture

Simmer until the leek is fully tender, about 10 minutes; this helps it blend smoothly with the squash. Remove the thyme and bay leaf before blending.

Add water gradually, 120 ml at a time, and stop when the soup is as thick or pourable as you like. Blend carefully, especially if using a jug blender with hot liquid.

Season gently

Thyme and bay leaf add herbal notes as the soup simmers, while cayenne brings a little heat. Start with the stated amount and add more only after tasting.

Salt levels vary between stocks, so make the final adjustment once the soup is blended and its flavour is concentrated.

Make it a meal

Serve the soup with crusty bread or toast for a straightforward lunch. For a more substantial meal, pair it with a sandwich or a crisp green salad.

A little extra stock or water can loosen leftovers in the bowl, while keeping the soup thick makes it easy to serve as a starter.

Recipe notes & tips

• Wash the sliced leek thoroughly, separating the layers to rinse away any grit.
• Reserve all the liquid released by the microwaved squash before adding it to the pan.
• Keep the heat moderate while browning the squash so the fond forms without burning.
• Scrape the pan well after adding the stock to lift the browned bits into the soup.
• Add the water in measured increments so you can control the final thickness.
• Taste for salt after blending, particularly if your stock is already seasoned.

Variations

• Vegetarian version: Choose vegetable stock and use olive oil instead of butter.
• More heat: Add a little extra cayenne after tasting the blended soup.
• Herb change: Use a small amount of sage in place of the thyme.
• Creamier finish: Stir in a splash of cream just before serving.
• Extra topping: Scatter toasted pumpkin seeds over each bowl for crunch.

Common mistakes to avoid

• Skipping the leek wash: Rinse between the layers after slicing so grit does not end up in the soup.
• Discarding the squash liquid: Reserve it and add it with the stock for extra flavour.
• Burning the fond: Keep the heat moderate and stir occasionally while browning the squash.
• Blending with the herbs inside: Remove the bay leaf and thyme sprigs first.
• Adding all the water at once: Thin the soup gradually, stopping at the consistency you prefer.

How to store

Cool the soup, then store it in an airtight container in the fridge for up to 3 days. Reheat gently in a saucepan, stirring occasionally; add a splash of water or stock if it has thickened.

Frequently asked questions