Why it works: Pepper and parsley 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- Soup
Ingredients
Directions
Prepare
Separate the heads from the eels and cut the bodies into short lengths.
Make the soup
Boil the eels in water with bread, mace, pepper, onion, and sweet herbs in a covered stew-pan until broken.
Strain the soup and pour it boiling hot over the toasted bread.
Season with parsley before serving.
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.
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Pepper + parsleytop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Pepper + oniontop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Mace + parsleytop 15% of all pairsSmell alikemoderateCooked together4,268 recipes
Shared aroma: myristicin (spice, warm).
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Bread + parsleytop 15% of all pairsSmell alikemoderateCooked together8,588 recipes
Shared aroma: 2,4-decadienal (seaweed).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Eels
- Provide the main body and rich flavour of the soup.
- Onion
- Adds savoury sweetness and aromatic depth to the broth.
- Toasted bread
- Soaks up the hot broth, giving the soup body and a soft texture.
The step that matters
Boil the eels until broken. Simmering in a covered pan keeps the liquid from evaporating while the eel proteins and collagen soften and release flavour into the broth. Stopping too early leaves the flesh firm and the soup thin; boiling too hard can make the broth cloudy.
Swap the mace
How well each one fits the dish's main ingredients (bread, pepper, onion, parsley):
- Thymefits better
- Marjoramfits better
- Garlicfits better
- Macethe original
Fit is the average pairing score against bread, pepper, onion, parsley. 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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