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 Soup
Ingredients
Directions
Prepare the eels
Skin the eels and bone 1 or 2.
Cut them into very small pieces.
Fry the pieces lightly in a stewpan with butter and parsley.
Make the soup
Add water, bread crust, mace, whole pepper, onion, and sweet herbs.
Cover and stew until the fish separates from the bones.
Strain the mixture.
Pound it to a paste.
Pass it through a sieve.
Finish and serve
Toast bread.
Cut it into dice.
Pour the boiling soup over it.
Add the scallops of eel.
Serve.
Mix cream or milk with flour, then add it.
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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Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Butter + breadtop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Butter + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Parsley + oniontop 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).
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 savoury flavour of the soup.
- Butter
- Fat that carries flavour during the light frying of the eel pieces.
- Onion
- Adds aromatic sweetness to the stock as it stews.
- Cream or milk
- Adds richness and a smooth, creamy texture to the finished soup.
- Flour
- Thickens the cream or milk so the soup becomes slightly more body.
The step that matters
Mixing the cream or milk with flour. Flour clumps when it meets liquid unevenly. Blending it smoothly with the cream or milk first lets it disperse, so the soup thickens evenly without lumps.
Swap the mace
How well each one fits the dish's main ingredients (butter, parsley, bread, pepper, onion, cream, flour):
- Thymefits better
- Capersfits better
- Nutmegfits better
- Macethe original
Fit is the average pairing score against butter, parsley, bread, pepper, onion, cream, flour. 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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