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Eel Soup

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

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 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

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

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

  3. Strain the mixture.

  4. Serve the 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
Provide the main flesh and body of the soup as they break down during stewing.
Crust of bread
Adds body and slight thickening to the broth as it softens during stewing.
Onion
Contributes savory, aromatic depth to the broth.

The step that matters

Stew until the fish is broken down. Stewing gently over a long period lets the eel's connective tissue and bones release gelatin and flavor into the liquid. Stopping too early leaves the broth thin and the fish underdeveloped, while a hard boil can cloud the soup.

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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