Why it works: Haddock and potato work together. They rank in the top 7% of all ingredient pairs, and 171 recipes mention both. Both carry ethanol, which smells alcoholic, ethereal. The science ↓
The recipe
Ingredients
Contains: milk, fish (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Poach the haddock
Cover the haddock with water in a shallow pan with skin side down.
Bring to the boil and simmer for 5 minutes, turning once.
Take the fish from the pan and remove the skin and bones.
Flake the fish and return to the stock.
Add chopped onion, bay leaf, salt and pepper.
Simmer for a further 10 minutes.
Strain the stock and keep it ready.
Discard the bay leaf and keep the fish warm.
Make the soup
Add the milk to the fish stock and bring to the boil.
Add mashed potato to make a rich and thick soup.
Add the fish.
Check the seasoning and add more if needed.
Serve
When serving, add the butter in small pieces so it runs through the soup.
Serve with chopped parsley on top.
Toast by the side.
Steps grouped into stages for easier reading; the method is the source's own.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.
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Haddock + potatotop 7% of all pairsAroma overlaplowMentioned together171 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Pepper + parsleytop 2% of all pairsAroma overlapstrongMentioned together34,118 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Onion + potatotop 2% of all pairsAroma overlapstrongMentioned together9,019 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Milk + buttertop 3% of all pairsAroma overlapstrongMentioned together81,222 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Potato + parsleytop 3% of all pairsAroma overlapstrongMentioned together2,855 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Smoked haddock
- Provides the main flavour and flaky texture of the soup.
- Milk
- Adds creaminess and body to the broth.
- Mashed potato
- Thickens the soup, giving it a rich, heavy texture.
- Butter
- Adds richness and a silky mouthfeel when stirred in at the end.
- Onion
- Adds savoury sweetness and aroma to the stock.
The step that matters
Adding the mashed potato. Potato thickens the soup as it is stirred in. Added to a boiling liquid without stirring or with lumps, it can clump or scorch on the base, so add it gradually and keep the soup moving.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (haddock, milk, butter, potato, pepper, parsley):
- Carrotbetter flavor fit
- Capsicumbetter flavor fit
- Tomatoabout as good a flavor fit
- Onionthe original
Fit is the average pairing score against haddock, milk, butter, potato, pepper, parsley. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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