Amelia Grace Carrots and leeks are two vegetables that seem to have been made for each other in soup form, the sweetness of the carrots balancing beautifully against the gentle, oniony depth that leeks bring.
This is exactly the sort of soup I make when I want something warming and properly comforting without a long shopping list.
It blends down into a beautifully silky texture, and the whole thing comes together from ingredients I almost always have to hand.
Why Cleaning Leeks Properly Actually Matters for This Soup
Leeks grow in a way that means soil and grit often get trapped between their layers, and skipping proper cleaning is one of the most common reasons a leek soup ends up unpleasantly gritty.
Slicing the leek first and then rinsing the sliced pieces thoroughly under cold running water, swishing them around in a bowl of water if needed, gets right into those tight layers where grit likes to hide.
Rinsing a whole, unsliced leek often misses grit trapped deep between the tightly wrapped layers near the base, which is exactly why slicing before washing gives you a much more reliably clean result.
Ingredients for Delia Smith Carrot and Leek Soup
- 25g unsalted butter
- 2 leeks, sliced and washed thoroughly
- 500g carrots, peeled and chopped
- 1 potato, peeled and chopped
- 1 litre vegetable or chicken stock
- Salt and freshly ground black pepper
- A swirl of cream, to serve (optional)
- Fresh chives, chopped, to garnish
How to Make Delia Smith Carrot and Leek Soup — Step by Step
Step 1 — Sweat the Leeks
Melt the butter in a large pan over low heat. Add the sliced, washed leeks and cook gently for 8–10 minutes, until soft but not coloured.
Step 2 — Add the Carrots and Potato
Add the chopped carrots and potato, stirring to coat in the butter, and cook for a further 5 minutes.
Step 3 — Add the Stock
Pour in the stock and bring to a simmer.
Step 4 — Simmer Until Tender
Cover and simmer gently for 20–25 minutes, until the vegetables are completely soft when pierced with a knife.
Step 5 — Blend Until Smooth
Remove from the heat and blend until completely smooth, using a stick blender or transferring in batches to a jug blender.
Step 6 — Season
Season with salt and pepper to taste.
Step 7 — Serve
Ladle into bowls, finishing with a swirl of cream and a scattering of fresh chives, if using.
My Top Tips for the Best Delia Smith Carrot and Leek Soup
Slice the leeks before washing them. This is genuinely the most reliable way to get all the trapped grit out from between the layers, avoiding a gritty finished soup.
Keep the heat low while sweating the leeks. You want them to soften gently rather than brown, which keeps that characteristic delicate leek flavour in the finished soup.
Add a potato for extra body. It’s a small addition, but it gives the soup a lovely, silky thickness once blended, without needing any cream in the base itself.
Blend until properly smooth. Take your time at this stage — a silky, lump-free texture is what makes this soup feel special rather than just functional.
Adjust the consistency to your liking. If the soup feels too thick once blended, loosen it with a little extra hot stock until it reaches the texture you prefer.
Serving Suggestions
Serve with warm crusty bread, or a swirl of cream on top for extra richness. A scattering of chives or a drizzle of good olive oil makes a nice finishing touch if you’re serving it for guests.
How to Store Delia Smith Carrot and Leek Soup
In the fridge: Store in an airtight container for up to 3 days. Reheat gently on the hob, stirring occasionally.
At room temperature: Not suitable — cool and refrigerate promptly after cooking.
In the freezer: Freezes beautifully for up to 3 months. Defrost fully in the fridge before reheating gently on the hob.
Delia Smith Carrot and Leek Soup Recipe
Ingredients
Method
- Melt butter and sweat the leeks gently for 8–10 minutes.
- Add the carrots and potato, cooking for a further 5 minutes.
- Pour in the stock and bring to a simmer.
- Cover and simmer for 20–25 minutes until tender.
- Blend until completely smooth.
- Season with salt and pepper.
- Serve with a swirl of cream and chives.
Notes
Frequently Asked Questions About Delia Smith Carrot and Leek Soup
Why does my soup taste gritty?
This is almost always down to soil trapped in the leek layers that wasn’t properly washed out. Slice the leeks first, then rinse thoroughly under running water before cooking.
Can I make this soup without a potato?
Yes, though the potato gives a lovely silky body to the soup. Without it, the soup will still be delicious but slightly thinner, so you may want to use a little less stock.
Can I make this soup vegan?
Yes — use vegetable stock instead of chicken, swap the butter for a plant-based alternative or a splash of olive oil, and use a plant-based cream alternative or omit it entirely.
Why is my soup not smooth enough?
This usually means it needs a little longer in the blender, or the vegetables weren’t fully cooked through before blending. Make sure everything is completely soft before you start, and blend thoroughly.
