Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Stewed Eels
Ingredients
Directions
Prepare the eels
Skin and cut the eels into 2-inch pieces, then wash them in salt water.
Dry the eels with a cloth.
Make the sauce
Melt the butter in a 3-pint stewpan and add the shredded onion, cooking until the onion is soft.
Stir in a little flour, pepper, and salt, along with the onion with cloves, bay leaf, and lemon peel.
Add the eel pieces and fry until nicely colored, stirring constantly.
Pour in the stock and simmer gently until the eels are cooked through.
Serve
Arrange the eels on a dish and strain the sauce over them.
Serve with toasted bread cut into triangles.
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 + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Pepper + clovetop 5% of all pairsSmell alikestrongCooked together17,451 recipes
Shared aroma: ethyl octanoate (fruity, wine).
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Butter + breadtop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Clove + lemontop 10% of all pairsSmell alikestrongCooked together8,150 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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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
- Eels
- Form the main body of the dish, becoming tender as they simmer in the stock.
- Butter
- Adds richness and fat, and helps the onion soften and the eels brown.
- Flour
- Thickens the stock into a sauce as it cooks with the butter and liquid.
- Onion
- Adds savory sweetness and aroma to the sauce as it softens in the butter.
- Stock
- Provides the liquid that cooks the eels and forms the body of the sauce.
The step that matters
Frying the eel pieces until nicely colored. Browning the eels in butter before adding stock builds deeper flavor through the Maillard reaction. Stirring constantly prevents the flour and butter from scorching on the pan.
Swap the onion
How well each one fits the dish's main ingredients (butter, flour, pepper, clove, lemon, bread):
- Shallotfits better
- Leekfits better
- Arrowrootfits better
- Onionthe original
Fit is the average pairing score against butter, flour, pepper, clove, lemon, bread. 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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