Why it works: Potato and onion are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Codfish Balls
Ingredients
Directions
Prepare the codfish
Soak the codfish overnight in water, then drain and remove any bones.
Boil the codfish until tender, then flake it into a bowl.
Shape and fry
Mix in the mashed potatoes, chopped onion, eggs, and black pepper until well combined.
Form the mixture into small balls and roll them in breadcrumbs.
Heat oil in a frying pan and fry the codfish balls until golden brown on all sides.
Drain on paper towels before serving.
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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Potato + oniontop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Potato + eggtop 29% of all pairsSmell alikemoderateCooked together4,978 recipes
Shared aroma: (e)-2-octenal (fatty, green).
-
Egg + peppertop 33% of all pairsSmell alikelowCooked together50,580 recipes
Shared aroma: 2-nonenal (fatty, green).
Egg and pepper barely smell alike, yet cooks put them together in 50,580 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
- Provides the main flavor and the flaky, savory body of the balls.
- Mashed potatoes
- Adds starch and moisture that bind the mixture and keep the centre soft.
- Eggs
- Bind the mixture so the balls hold their shape while frying.
- Breadcrumbs
- Form a crisp, browned coating when fried.
- Onion
- Adds aromatic sweetness and savory depth to the mixture.
The step that matters
Fry until golden brown on all sides. Frying at a steady heat browns the breadcrumb coating and sets the eggs, so the balls hold their shape. Oil that is too cool lets them absorb grease and fall apart, while oil that is too hot can brown the outside before the centre is heated through.
Swap the onion
How well each one fits the dish's main ingredients (potato, egg, pepper):
- Capsicumfits better
- Asparagusfits better
- Spinachfits better
- Onionthe original
Fit is the average pairing score against potato, egg, 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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