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 cod
Soak the cod in plenty of water for 2 hours, skin side up.
Place the cod in cold water over the fire and bring to a boil.
Remove the cod, take off the skin, and pick out all the bones.
Make the hash
Mash the drained boiled potatoes until smooth.
Combine the mashed potatoes with the cod, adding butter, milk, and salt if needed.
Work the mixture until light.
Fold in the beaten egg.
Cook in a shallow, hot kettle until heated through.
Serve hot.
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 + milktop 9% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
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Fish + buttertop 12% of all pairsSmell alikemoderateCooked together4,488 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Fish + milktop 13% of all pairsSmell alikemoderateCooked together1,432 recipes
Shared aroma: 4-heptenal (creamy, biscuit).
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Potato + buttertop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cod
- Provides the main flesh and flavor of the hash once soaked and boiled.
- Potatoes
- Bind with the fish and give the hash its soft, mashed body.
- Butter
- Adds richness and fat, softening the mixture and adding flavor.
- Milk
- Adds moisture, keeping the mashed mixture soft and smooth.
- Egg
- Binds the mixture and helps it set as it heats.
The step that matters
Work the mixture until light. Beating the mashed potato and fish until airy incorporates air and makes the hash lighter; overworking can make it gluey, so stop once it looks fluffy.
“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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