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 ↓
Fish, Croquettes of
Ingredients
Directions
Prepare
Remove all skin and bones from the fish and chop it coarsely.
Heat the butter in a pan.
Shape and fry
Combine the chopped fish, mashed potatoes, butter, egg yolk, and whole egg in a bowl.
Season with salt and pepper.
Form the mixture into small patties and coat with breadcrumbs.
Fry in hot fat until golden brown.
Serve warm.
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).
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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).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mashed potatoes
- Adds body and moisture, helping the mixture hold together while staying soft inside.
- Egg yolk
- Binds the mixture so the patties hold their shape when fried.
- Whole egg
- Adds structure as it sets, binding the fish and potato together.
- Butter
- Adds richness and fat, contributing flavour and a tender texture.
- Breadcrumbs
- Form a crisp coating that browns when fried.
The step that matters
Frying in hot fat. If the fat is not hot enough, the patties absorb more oil and turn greasy before the coating browns. Hot fat quickly sets and browns the crumb crust while the interior heats through.
Swap the potato
How well each one fits the dish's main ingredients (fish, butter, egg, milk, pepper):
- Potatothe original
- Capsicumfits about as well
- Asparagusfits less well
- Chivefits less well
Fit is the average pairing score against fish, butter, egg, 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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