Cullen Skink (Scottish Smoked Haddock Soup)

About This Recipe

Cullen skink takes its name from the fishing village of Cullen on the Moray Firth in north-east Scotland, where it has been made for at least two centuries from the village's most prized export: Finnan haddie, a cold-smoked haddock cured over green wood that imparts a distinctive pale yellow colour and a haunting woodsmoke aroma. The word 'skink' is old Scots for a soup or broth made from the shin of a beef, but here it has been borrowed for a humbler, fishier version. The dish is austere by design: smoked haddock is poached gently in whole milk and water with a single bay leaf until it releases its smoke and flavour into the liquid, then flaked and reserved. Onions are sweated in butter, waxy potatoes simmered in the strained poaching milk until tender, and the flaked fish folded back in at the end with a generous knob of butter and a flurry of chopped parsley. There is no flour, no cream, no leek (despite what many recipes claim), and certainly no smoked paprika — the smoke comes from the fish, not a spice rack. The texture sits between a chowder and a thick soup, with chunks of potato and pearly fish suspended in a creamy, faintly amber broth. Served with crusty oatcakes or a thick slice of brown bread, it is one of the great fish dishes of the British Isles and is now formally protected under a Scottish PGI bid.

Ingredients

Serves 4

• 500 gundyed naturally smoked haddock fillet (Finnan haddie if available), skin on
• 600 mlwhole milk
• 300 mlwater
• 1bay leaf
• 1 largewhite onion, finely diced
• 500 gwaxy potatoes (Charlotte or Maris Peer), peeled and diced 1 cm
• 50 ggood salted butter, plus extra to finish
• 2 tbspflat-leaf parsley, finely chopped
• freshly ground white pepper, to taste

Instructions

1. 1

   Poach the haddock

   Place the haddock skin-side down in a wide pan. Pour over the milk and water, add the bay leaf, and bring to barely a tremble over medium heat. Reduce to low and poach for 6–7 minutes until the fish flakes when prodded with a knife.

2. 2

   Strain and flake

   Lift the haddock onto a plate using a fish slice. Strain the poaching liquid through a fine sieve into a jug and reserve. Once cool enough to handle, remove the skin and any pin bones from the haddock, then flake into chunky pieces with two forks. Reserve in a warm bowl.

3. 3

   Sweat the onion

   Wipe the pan dry. Melt the butter over low heat, add the onion with a small pinch of salt, and sweat gently for 10 minutes until completely soft and translucent but not coloured — colour gives bitterness to a delicate soup like this.

4. 4

   Cook the potatoes

   Add the diced potato to the buttery onions and stir to coat. Pour in the strained smoky milk-poaching liquid. Bring to a low simmer and cook uncovered for 12–14 minutes until the potatoes are tender at the centre but still holding their shape.

5. 5

   Thicken naturally

   Lift out about a third of the potato cubes with a slotted spoon and crush roughly with a fork on the side of the bowl. Stir the mash back into the soup — it will thicken the broth to a creamy chowder consistency without flour or cream.

6. 6

   Return the fish

   Reduce the heat to its lowest setting and slide the flaked haddock back into the pan. Warm through gently for 2 minutes — boiling will toughen the fish. Taste the soup; smoked haddock is salty so adjust with white pepper but go easy on salt.

7. 7

   Finish and serve

   Off the heat, stir in an extra knob of butter for shine and most of the parsley. Ladle into warm bowls and finish each with the remaining parsley and a final twist of white pepper. Serve straight away with oatcakes or buttered brown bread on the side.

Variations

• •

  Cullen skink with leek — a 20th-century variant common in Edinburgh restaurants; soften 1 chopped leek with the onion.

• •

  Modern cream version — finish with 100 ml double cream for a richer chowder-style soup popular in tourist restaurants.

• •

  Cullen skink risotto — Tom Kitchin's adaptation, using the poaching milk as the cooking liquid for arborio rice.

• •

  Cullen skink fish cakes — bind cold soup with mashed potato and breadcrumbs, fry in butter for the next day's lunch.

Storage

Refrigerate 2 days in a sealed container; the soup thickens significantly on chilling and develops in flavour. Reheat gently over low heat — never boil. Does not freeze well: the potatoes go grainy and the haddock becomes rubbery on thawing.

Frequently Asked Questions