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Fish Soup

A clear soup made from a large fish, water, onion, herbs, butter, salt, and pepper.

From an old cookbook · modernised transcription
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Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Fish Soup

Ingredients

Directions

Prepare and cook

  1. Clean the fish thoroughly.

  2. Place the fish in a pot with water, using 4 cups of water for each pound of fish.

  3. Add the chopped onion and sweet herbs.

  4. Cook until the fish is done and tasteless.

Strain and season

  1. Strain the mixture through a colander.

  2. Return the liquid to the pot, add butter, salt, and pepper to taste.

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

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

  2. Fish + buttertop 12% of all pairs
    Smell alikemoderate
    Cooked together4,488 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

  3. Onion + buttertop 15% of all pairs
    Smell alikemoderate
    Cooked together42,912 recipes

    Shared aroma: decanal (soap, orange peel).

  4. Fish + oniontop 19% of all pairs
    Smell alikelow
    Cooked together1,924 recipes

    Shared aroma: 2,4-decadienal (seaweed).

  5. Fish + peppertop 21% of all pairs
    Smell alikemoderate
    Cooked together3,948 recipes

    Shared aroma: 2-nonenal (fatty, green).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Fish
Releases flavor and body into the cooking liquid, forming the base of the broth.
Onion
Adds aromatic sweetness to the broth as it softens during cooking.
Sweet herbs
Contribute aromatic flavor to the broth as they steep in the liquid.
Butter
Adds fat that gives the finished broth richness and a smoother mouthfeel.

The step that matters

Cook until the fish is done. Simmering gently rather than boiling hard keeps the fish tender and the broth clear. Vigorous boiling can break up the fish and cloud the liquid, while overcooking leaves little flavor in the fish.

Swap the onion

How well each one fits the dish's main ingredients (fish, butter, pepper):

  1. Capsicumfits better
  2. Potatofits better
  3. Tomatofits about as well
  4. Onionthe original

Fit is the average pairing score against fish, butter, 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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