Why it works: Parsley and pepper match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Eel Broth
Ingredients
Directions
Prepare
Wash, clean, and skin the eel, then cut it into small pieces.
In a stewpan, combine the eel pieces, cold water, onion, parsley, bay leaf, cloves, and a little salt and pepper.
Simmer and strain
Simmer gently for about 1.5 hours, skimming as necessary.
Strain the broth into a basin and let it cool.
Remove any fat that rises to the surface.
Serve
Reheat in small quantities as needed.
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.
Photo for illustrative purposes only · Contact us to use it
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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Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Clove + peppertop 5% of all pairsSmell alikestrongCooked together17,451 recipes
Shared aroma: ethyl octanoate (fruity, wine).
-
Parsley + clovetop 6% of all pairsSmell alikestrongCooked together6,768 recipes
Shared aroma: cuminaldehyde (Spicy, cumin).
-
Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Eel
- Gives the broth its main flavour and body as it simmers.
- Cold water
- Extracts flavour and gelatin from the eel as it slowly heats.
- Onion
- Adds savoury sweetness and aromatic depth to the broth.
The step that matters
Simmer gently and skim. A gentle simmer keeps the broth clear, while a hard boil emulsifies fat into it and clouds the liquid. Skimming removes foam and impurities that would otherwise spoil the flavour and appearance.
Swap the onion
How well each one fits the dish's main ingredients (parsley, clove, pepper):
- Carrotfits better
- Shallotfits better
- Capsicumfits better
- Onionthe original
Fit is the average pairing score against parsley, clove, 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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