Seafood

Cullen Skink: What It Is, How to Make It, and Why It Beats Chowder

Cullen skink is Scotland's great fish soup — smoked haddock, potato, onion, milk. What the name means, the proper recipe, the mistakes that ruin it, and where it comes from.

By Gary·3 August 2026·8 min read

Cullen skink is the best thing Scotland has ever done with a fish, which is a big claim from a country that invented taking haddock to the chip shop. It's a soup — smoked haddock, potato, onion, milk — and that four-ingredient list undersells it the way "flour, water, yeast" undersells bread. Done properly it's smoky, sweet, and rich enough to count as dinner. Done badly it's fish porridge, and plenty of places do it badly. Here's the whole story: what it is, what the ridiculous name means, and how to make one that would pass in a Moray fishing town.

What is cullen skink?

A thick soup of smoked haddock, potatoes and onions in milk, from the town of Cullen on the Moray Firth coast. It sits somewhere between a chowder and a bisque in body, but it's leaner than either — no bacon, no wine, traditionally no cream and definitely no flour. The smokiness comes entirely from the fish, which is why the fish you choose decides everything (more on that below).

You'll find it on menus the length of the country, from harbourside cafés to tasting menus that charge like it's an endangered species. It's also one of the easiest genuinely impressive dishes in the entire Scottish repertoire to make at home: one pot, half an hour, no technique that would frighten a first-timer.

What does "skink" mean?

Not what it sounds like. Skink is an old Scots word for a shin of beef, and by extension the soup you made from one. When the fishing communities of the Moray coast swapped the beef for what they actually had — smoked haddock, in industrial quantities — the name came along for the ride. So "Cullen skink" just means "Cullen's soup", via a word that originally meant beef shin. Scots is like that.

Cullen itself is a small former herring town between Buckie and Banff, better known nationally for this soup than for anything else — a fact the town has embraced to the point of hosting the annual World Cullen Skink Championships, where the definition of "world" is doing some heavy lifting and nobody minds.

The fish is the whole dish

One decision matters more than everything else combined: undyed smoked haddock, ideally the pale, properly cold-smoked stuff — what the trade calls finnan haddie, named for Findon, another north-east fishing village. The lurid yellow "smoked" haddock in most supermarket chiller cabinets is often dyed and lightly smoked at best; it'll make soup, but it won't make the soup.

Ask a fishmonger for undyed smoked haddock on the bone if you can get it — the bones and skin go into the milk and pay rent. If you're not sure how to navigate a fish counter without bluffing, our fishmonger's guide covers exactly this conversation, and good mail-order fish reaches most of the UK overnight these days.

The proper method

Serves four as a starter, two people who've been outside all day as dinner.

You need: a good-sized piece of undyed smoked haddock (skin on), one onion, a knob of butter, two or three floury potatoes (Maris Piper works), whole milk, a bay leaf, chives, black pepper. Note the absence of flour, stock cubes and cream.

Poach the fish first. Put the haddock in a pan, cover with milk, add the bay leaf, bring to a bare simmer and turn off the heat after two or three minutes. Lift the fish out; keep the milk — it's now smoked-haddock milk, and it is the soup.
Sweat the onion in butter in your soup pot, gently, without colour — five to ten minutes.
Add the potatoes, diced, and the poaching milk. Simmer until the potato is soft.
Thicken with the potato itself. Crush some of it against the side of the pan — that's the traditional body of the dish. No flour. Flour is how hotels ruin it.
Flake in the fish, skin and bones removed, in proper generous pieces. Warm through — don't boil it again, the fish is already cooked and boiling milk is nobody's friend.
Finish with black pepper and chives. Some people mount in a little cream or an extra knob of butter at the end; the coast would forgive the butter sooner.

The whole thing rewards restraint. Every bad cullen skink we've ever had was over-thickened, over-blended, or made with fish that had more food colouring than smoke in it. The dish is four ingredients standing in the right order — let them.

Cullen skink vs chowder

The comparison everyone reaches for, so let's settle it. New England chowder brings bacon, cream, sometimes a roux; it's richer, heavier, and the smoke (when there is any) comes from the pork. Cullen skink runs cleaner: all the depth is smoked fish and butter, which means you can actually taste the haddock rather than the dairy. We're biased, obviously. We're also right — one is a soup with fish in it, the other is fish in soup form.

Frequently asked questions

What is cullen skink made of?

Smoked haddock, potatoes, onion, butter and milk — that's the traditional list in full. No flour, no stock cube, and cream is a modern flourish rather than a requirement. All the flavour comes from properly smoked fish poached in the milk that becomes the soup.

What does the word "skink" mean?

It's an old Scots word for a shin of beef, and by extension a soup made from one. The Moray coast version swapped beef for smoked haddock and kept the name — so Cullen skink literally means "soup from Cullen".

Where is Cullen?

A small former fishing town on the Moray Firth coast in the north-east of Scotland, between Buckie and Banff. The town leans into its fame and hosts an annual World Cullen Skink Championship.

What's the difference between cullen skink and chowder?

Cullen skink has no bacon, traditionally no cream, and is thickened with its own potato rather than flour — so it's lighter-bodied and all the smokiness comes from the haddock. Chowder is richer and creamier with pork-led depth.

Can you freeze cullen skink?

You can, but it's a downgrade — milk-based soups can split on reheating and the potato texture suffers. If you must, freeze before adding the fish and finish it fresh. It keeps well in the fridge for a couple of days; reheat gently, never at a boil.

What fish should I use for cullen skink?

Undyed smoked haddock — the pale, cold-smoked kind (finnan haddie), ideally on the bone. The bright-yellow dyed fillets in supermarket chillers are the most common reason a homemade skink tastes of nothing much.

Free: 10 Scottish Recipes Everyone Should Cook Once

From a proper Cullen skink to tablet that sets just right — the classics in plain steps, sent to your inbox.

Free. No spam — unsubscribe from any email. You'll join the TasteSCOT list.

7 min read