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 ↓
Creole Soup
Ingredients
Directions
Make the soup
Cook the green peppers and onion in butter for 5 minutes.
Add flour, stock, and tomatoes, then simmer for 15 minutes.
Strain the mixture through a sieve.
Season with salt, pepper, and cayenne.
Finish and serve
Just before serving, stir in the horseradish, vinegar, and macaroni rings.
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).
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Tomato + peppertop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Tomato + oniontop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Flour + horseradishtop 10% of all pairsSmell alikestrongCooked together743 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Pepper + horseradishtop 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
- Butter
- Fat that softens the green peppers and onion and carries their flavor into the soup.
- Flour
- Thickens the stock and tomatoes into a smooth, body-rich soup.
- Brown stock
- Forms the liquid base that gives the soup its savory depth.
- Tomatoes
- Add acidity, color, and a fresh tomato flavor to the base.
- Horseradish
- Adds sharp, pungent heat that stays bright because it is added at the end.
- Macaroni rings
- Add soft, chewy pasta pieces that give the soup substance.
The step that matters
Stir in the horseradish, vinegar, and macaroni just before serving. Horseradish loses its pungent bite when heated for long, and cooked pasta softens further the longer it sits in hot liquid. Adding them at the end keeps the sharp flavor and the pasta's texture intact.
Swap the tomato
How well each one fits the dish's main ingredients (pepper, onion, butter, flour, vinegar, horseradish):
- Mustardfits better
- Shallotfits better
- Chivefits better
- Tomatothe original
Fit is the average pairing score against pepper, onion, butter, flour, vinegar, horseradish. 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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