Why it works: Potato and pepper are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 8,305 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Recipe for Codfish Balls
Ingredients
Directions
Prepare
Wash the codfish in cold water.
Put the codfish and potatoes in a saucepan, cover with boiling water, and cook until the potatoes are done.
Drain the mixture and mash it.
Add a speck of pepper, butter, and the beaten egg to the mashed mixture.
Fry
Heat the cooking fat in a frying pan until smoking hot.
Drop the mixture by tablespoons into the frying pan and fry until brown, turning once.
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 + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Potato + buttertop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Butter + peppertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Potato + eggtop 29% of all pairsSmell alikemoderateCooked together4,978 recipes
Shared aroma: (e)-2-octenal (fatty, green).
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 body of the balls.
- Potatoes
- Adds starch that binds the mixture and gives a soft, tender interior.
- Egg
- Binds the mashed mixture together so the balls hold their shape.
- Butter
- Adds richness and moisture to the mashed mixture.
The step that matters
Frying the mixture in smoking-hot fat. Dropping the mixture into fat that is already smoking hot sears the outside quickly, forming a browned crust that helps the balls hold their shape. Fat that is not hot enough lets the mixture soak up oil and fall apart.
Swap the potato
How well each one fits the dish's main ingredients (butter, egg, pepper):
- Capsicumfits better
- Asparagusfits about as well
- Chivefits about as well
- Potatothe original
Fit is the average pairing score against butter, 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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