Why it works: Onion and horseradish match in chemistry and in kitchens. They rank in the top 7% of all ingredient pairs, and cooks put them together in 1,784 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
To Stew Eels
Ingredients
Directions
Stew the eels
In a saucepan, combine the beef gravy, port wine, anchovies, onions, horseradish, and Cayenne pepper.
Add the eels to the cold sauce and let them stew for 1 hour.
Thicken the sauce
Skim off the fat and remove a little gravy to cool.
Stir in flour, cream, or butter to thicken the cooled gravy.
Bring the gravy to a boil before adding the eels back in and let it boil together.
Serve
Serve garnished with lemon and horseradish.
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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Onion + horseradishtop 7% of all pairsSmell alikestrongCooked together1,784 recipes
Shared aroma: coumarin (sweet, hay).
-
Beef + oniontop 7% of all pairsSmell alikemoderateCooked together17,092 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Beef + peppertop 10% of all pairsSmell alikemoderateCooked together18,971 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Horseradish + flourtop 10% of all pairsSmell alikestrongCooked together743 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Horseradish + peppertop 11% of all pairsSmell alikemoderateCooked together2,646 recipes
Shared aroma: coumarin (sweet, hay).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Eels
- Provide the main meat, which becomes tender through slow stewing in the sauce.
- Beef gravy
- Forms the savory, rich liquid base that carries the whole dish.
- Port wine
- Adds sweetness and fruity depth that balances the savory gravy.
- Anchovies
- Contribute deep savory flavor that blends into the sauce and disappears as a fishy note.
- Onions
- Release sweetness and aroma into the sauce as they stew.
- Flour, cream, or butter
- Thickens the gravy so it coats the eels instead of running thin.
The step that matters
Thickening the cooled gravy. Starch thickens only when heated, and stirring it into gravy that is cooled first helps it disperse without lumps. Bringing the gravy to a boil then activates the thickening so the sauce sets to a coating consistency.
Swap the horseradish
How well each one fits the dish's main ingredients (beef, port wine, onion, pepper, flour):
- Shallotfits better
- Capsicumfits better
- Carrotfits better
- Horseradishthe original
Fit is the average pairing score against beef, port wine, onion, pepper, 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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