Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Salt Codfish Hash
Ingredients
Directions
Prepare the hash
Chop the cooked salt codfish finely.
Mash the potatoes and work them until light with butter and milk.
Gradually mix the mashed potatoes into the chopped fish until well combined.
Season the mixture with salt and pepper as needed.
Heat the mixture in a pot, stirring constantly.
Fry and serve
Melt enough butter or beef dripping in a frying pan to cover the bottom.
Once hot, press the hash firmly into the pan and fry gently.
When the bottom is browned, turn it out onto a hot dish and serve.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Potato + milktop 9% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
-
Potato + buttertop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Butter + peppertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Salt codfish
- Provides the main savoury flavour and salty character of the hash.
- Potatoes
- Bind the fish together and give the hash a soft, light body.
- Butter
- Adds richness and flavour, and helps the surface brown in the pan.
- Milk
- Adds moisture and makes the mashed potatoes smoother and lighter.
The step that matters
Fry gently until the bottom browns. Pressing the hash firmly into hot fat and frying slowly lets the bottom form an even brown crust through the Maillard reaction. Turning too early or using heat that is too high can leave the crust patchy or burnt before the centre is hot.
Swap the potato
How well each one fits the dish's main ingredients (butter, milk, pepper):
- Potatothe original
- Capsicumfits about as well
- Tomatofits less well
- Asparagusfits less well
Fit is the average pairing score against butter, milk, pepper. Candidates are from the same food group and used in at least 100 recipes.
“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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