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 ↓
Codfish Balls
Ingredients
Directions
Prepare the fish
Prepare the codfish by washing and soaking it.
Mince the fish finely and boil it in water for 20 minutes.
Drain the fish and cover it with fresh boiling water; boil for another 20 minutes.
Drain the fish very dry and let it cool on a dish.
Make the mixture
Add an equal amount of mashed potatoes to the cooled fish.
Work in a lump of butter, sweet milk, and flour to form a stiff batter.
Shape and fry
Flour your hands and shape the mixture into balls or cakes.
Drop the balls into boiling lard or drippings and fry until light brown.
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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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Potato + buttertop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Milk + flourtop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Codfish
- Forms the main body of the balls and gives them their savoury flavour.
- Mashed potatoes
- Adds starch and bulk, helping the mixture hold together as a soft, binding base.
- Butter
- Adds richness and moisture, softening the batter and contributing to flavour and browning.
- Sweet milk
- Adds moisture and softness to the batter, helping it bind smoothly.
- Flour
- Thickens the batter into a stiff mixture that holds its shape before frying.
- Lard or drippings
- Fries the balls, conducting heat to brown the outside and add flavour.
The step that matters
Drain the fish very dry. Excess water dilutes the batter and makes the balls soft and likely to fall apart or steam rather than fry well in the hot fat.
Swap the potato
How well each one fits the dish's main ingredients (butter, milk, flour):
- Potatothe original
- Arrowrootfits about as well
- Leekfits less well
- Shallotfits less well
Fit is the average pairing score against butter, milk, flour. 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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