Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Stewed Eels
Ingredients
Directions
Make the stew
Melt the butter in a stewpan.
Add the chopped onions and cook until light brown.
Stir in the flour until well blended.
Add the stock, port, bay leaves, salt, and pepper.
Cut the eels into 2-inch lengths and add them to the stewpan.
Cover tightly and stew for 15 minutes.
Serve
Serve on a hot platter with large croutons or neat pieces of toast.
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 + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + oniontop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
-
Flour + oniontop 17% of all pairsSmell alikemoderateCooked together32,460 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + peppertop 19% of all pairsSmell alikemoderateCooked together50,459 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Eels
- Provide the main protein, which becomes tender as they stew in the liquid.
- Butter
- Adds richness and fat that carries flavour through the stew.
- Flour
- Thickens the stock into a smooth, body-rich sauce when stirred in.
- Port
- Adds sweetness and depth of flavour to the liquid.
- Onions
- Build savoury sweetness and aroma as they brown in the butter.
The step that matters
Covering and stewing the eels. Eels are cooked gently in covered liquid so the flesh becomes tender without drying or breaking apart. Keeping the lid tight holds in steam and heat, so the stew should stay at a gentle simmer rather than a hard boil.
Swap the onion
How well each one fits the dish's main ingredients (butter, flour, pepper):
- Shallotfits better
- Chivefits better
- Capsicumfits better
- Onionthe original
Fit is the average pairing score against butter, flour, 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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