Why it works: Pepper and tomato are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,923 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Fried Eels
Ingredients
Directions
Prepare
Cut the eels into pieces three inches long.
Season the eels with coarse sea salt and black pepper, then dredge them in flour.
Fry and serve
Heat a frying pan with butter and lard until hot.
Add the eels to the pan, cover, and fry until light brown, about 10 minutes.
Turn the eels, baste, and fry for another 10 minutes.
Transfer the eels to a warm chafing dish.
Add hot water to the pan, boil for 1 minute, and stir from the bottom.
Stir in tomato ketchup and pour the mixture into the gravy dish.
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 + tomatotop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + ketchuptop 13% of all pairsSmell alikemoderateCooked together2,435 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Pepper + flourtop 19% of all pairsSmell alikemoderateCooked together50,459 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Pepper + buttertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Flour and butter 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
- Form the main body of the dish, cooking through while the flour crust browns.
- Flour
- Coats the eels so the surface browns and crisps during frying.
- Butter
- Adds richness and flavour to the frying fat and aids browning.
- Lard
- Provides a high-temperature frying fat that helps the coating brown evenly.
- Tomato ketchup
- Adds sweetness and acidity to the pan gravy.
The step that matters
Dredging and frying the eels. Flour coating must be dry and even, and the pan must be hot before the eels go in. Otherwise the coating absorbs fat unevenly, steams instead of browning, and the eels stick or turn greasy.
Swap the tomato
How well each one fits the dish's main ingredients (pepper, flour, butter, ketchup):
- Capsicumfits better
- Shallotfits better
- Turnipfits better
- Tomatothe original
Fit is the average pairing score against pepper, flour, butter, ketchup. 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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