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Codfish Balls

Codfish balls are fried balls made from boiled cod, mashed potatoes, onion, eggs, pepper, and breadcrumbs.

From an old cookbook · modernised transcription
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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

  1. Soak the codfish overnight in water, then drain and remove any bones.

  2. Boil the codfish until tender, then flake it into a bowl.

Shape and fry

  1. Mix in the mashed potatoes, chopped onion, eggs, and black pepper until well combined.

  2. Form the mixture into small balls and roll them in breadcrumbs.

  3. Heat oil in a frying pan and fry the codfish balls until golden brown on all sides.

  4. Drain on paper towels before serving.

Recipe from a historical cookbook (Internet Archive).

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.

  1. Potato + oniontop 3% of all pairs
    Smell alikemoderate
    Cooked together9,023 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  2. Potato + peppertop 9% of all pairs
    Smell alikemoderate
    Cooked together8,305 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  3. Onion + peppertop 11% of all pairs
    Smell alikemoderate
    Cooked together68,474 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  4. Potato + eggtop 29% of all pairs
    Smell alikemoderate
    Cooked together4,978 recipes

    Shared aroma: (e)-2-octenal (fatty, green).

  5. Egg + peppertop 33% of all pairs
    Smell alikelow
    Cooked 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):

  1. Capsicumfits better
  2. Asparagusfits better
  3. Spinachfits better
  4. 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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