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Eel Soup

A soup made by stewing eels with water, bread, mace, pepper, onion, and sweet herbs, then served over toasted bread.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Pepper and onion 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 ↓

Eel Soup

Ingredients

Directions

Make the soup

  1. Place the eels in a pot with water, bread, mace, pepper, onion, and sweet herbs.

  2. Cover and stew until the fish is completely broken down.

  3. Strain the mixture to remove solids.

Serve

  1. Toast bread and cut the toasted bread into dice.

  2. Pour the hot soup over the toasted bread.

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. Pepper + oniontop 11% of all pairs
    Smell alikemoderate
    Cooked together68,474 recipes

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

  2. Bread + oniontop 15% of all pairs
    Smell alikemoderate
    Cooked together8,676 recipes

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

  3. Mace + peppertop 16% of all pairs
    Smell alikelow
    Cooked together12,257 recipes

    Shared aroma: myristicin (spice, warm).

  4. Bread + peppertop 16% of all pairs
    Smell alikemoderate
    Cooked together20,964 recipes

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

  5. Mace + oniontop 17% of all pairs
    Smell alikelow
    Cooked together7,078 recipes

    Shared aroma: eugenol (clove, spicy).

Mace and pepper barely smell alike, yet cooks put them together in 12,257 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

Eels
Break down during stewing to give the soup its body and rich fish flavor.
Bread
Adds body and thickens the soup, and toasted pieces give a crisp contrast.
Onion
Contributes aromatic sweetness and savory depth to the broth.

The step that matters

Stew until the fish is completely broken down. Gentle, long simmering lets the bones and flesh release gelatin and flavor into the liquid. Stopping early leaves a thin, less flavorful broth that is harder to strain cleanly.

Swap the mace

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

  1. Garlicfits better
  2. Parsleyfits better
  3. Thymefits better
  4. Macethe original

Fit is the average pairing score against bread, pepper, onion. 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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