Scotland's National Soup

Cock-a-leekie has been simmering on Scottish stoves for centuries, and it has the credentials to prove it. The first known printed recipe dates to 1598, though the name itself didn't settle into common use until the 18th century. It's regularly served at Burns Night suppers and St Andrew's Day dinners, sitting alongside haggis and cranachan as one of those dishes that just feels Scottish in the bone. In fact, first-class passengers aboard the Titanic were served cock-a-leekie on the night of 14 April 1912, which tells you something about how seriously the dish was taken.

The soup almost certainly has French roots. Scotland and France were long-standing political allies under the Auld Alliance, and the original dish was likely a simple chicken and onion broth from across the Channel. Once it arrived in Scotland, the onions gave way to leeks, which were far more abundant here. That swap turned it into something entirely its own. The prunes, which confuse people today, are part of the authentic recipe. Combining dried fruit with meat in broths was common in medieval cooking, and the sweetness they bring to the broth is genuinely lovely once you stop overthinking it.

Getting It Right

The secret to a good cock-a-leekie is patience with the stock. Using a whole chicken, or bone-in pieces at a minimum, and letting it simmer slowly for a full hour is what gives you a broth with real depth. Don't rush it and don't be shy with the seasoning at this stage. White pepper is the traditional choice, giving a gentler warmth than black, but either will do.

This recipe uses pearl barley rather than rice. Barley has been grown in Scotland since the Bronze Age and was historically a far more common grain here than rice ever was. It adds a pleasantly chewy texture and thickens the broth naturally as it cooks. The prunes go into the soup during the final simmer rather than just scattered on top as garnish: cooked in the stock, they melt slightly and round out the flavour in a way that a garnished prune simply cannot. Use stoned, ready-to-eat dried prunes and cut them into rough pieces so they break down gently.

Keep the leek whites firm and not overcooked. Add them after the barley is already underway, and add the green parts right at the end. The greens only need a few minutes or they turn drab and a bit sulphurous. Seasoning the stock well at the beginning, then tasting and adjusting right at the end, is the approach that gets you the best result.

Serving and Variations

Cock-a-leekie is a meal in itself with a thick slice of crusty bread or some Scottish oatcakes on the side. You don't need anything more. If you'd rather skip the prunes, the soup is still excellent without them, though you'll be missing a bit of character. For a shortcut version, a good-quality chicken stock plus shredded leftover roast chicken works well: use 1.5 litres of stock, skip the stock-making stage, and proceed from the barley step. The soup keeps well in the fridge for three or four days and reheats beautifully; just add a splash of water if the barley has thickened it too much overnight.

Ingredients

• 1 small whole chicken (approx. 1.3-1.5kg)
• 4 large leeks, trimmed and washed
• 3 medium carrots, peeled
• 2 sticks of celery
• 2 bay leaves
• 1 tsp white peppercorns (or 1 tsp ground white pepper)
• 1.5 tsp fine salt, plus more to taste
• 2.5 litres cold water
• 100g pearl barley, rinsed under cold water
• 100g stoned, ready-to-eat dried prunes, roughly chopped
• Small handful of fresh flat-leaf parsley, roughly chopped (to finish)

Method

1. Prepare the leeks: cut off and discard the dark tough tops, then separate the green parts from the white. Roughly chop the green parts and set the whites aside. Peel and roughly chop 1 of the carrots and roughly chop the celery.
2. Place the whole chicken into a large pot (at least 6 litres). Add the chopped leek greens, the roughly chopped carrot, and the celery. Tuck in the bay leaves and add the white peppercorns (or ground white pepper) and 1.5 tsp salt. Pour over the cold water; it should just cover the chicken. If not, add a little more.
   
3. Bring the pot to the boil over a high heat, skimming off any grey foam that rises to the surface during the first 10 minutes. Once boiling, reduce the heat to a gentle simmer, partially cover with a lid, and cook for 60-70 minutes until the chicken is completely cooked through and the meat is starting to fall away from the bone.
   
4. Carefully lift the chicken out of the pot using tongs or a slotted spoon and set it in a large bowl or colander to cool slightly. Strain the stock through a sieve into a clean pot or large bowl, discarding the cooked vegetables and bay leaves. Return the strained stock to the pot.
   
5. Slice the white parts of the leeks into 1cm rounds. Cut the remaining 2 carrots into small dice, roughly 1cm pieces.
6. Bring the strained stock back to a gentle simmer over a medium heat. Add the rinsed pearl barley and the diced carrots. Simmer for 20 minutes, stirring occasionally.
7. While the barley cooks, remove the skin from the chicken and discard it. Pull all the meat from the carcass, discarding the bones. Shred or tear the meat into rough chunks. You should get around 350-400g of cooked chicken.
   
8. After the barley has had its 20 minutes, add the sliced leek whites and the chopped prunes to the pot. Simmer for a further 15 minutes until the leeks are tender and the barley is soft but still has a little bite.
   
9. Add the shredded chicken back into the pot and stir through. Taste the soup carefully and adjust the seasoning with salt and white pepper as needed. If the flavour feels flat, let it simmer uncovered for a further 5-10 minutes to concentrate.
10. Stir through most of the chopped parsley. Ladle into deep bowls, scatter over the remaining parsley, and serve with crusty bread or oatcakes.