Why it works: Turnip and carrot match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 8,002 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Onion Soup
Ingredients
Directions
Prepare the broth
Strain the mutton broth.
Brown the onions
Fry the sliced onions in a pan until nicely browned.
Simmer and serve
Add the browned onions to the broth.
Add the sliced turnips and carrots to the broth.
Simmer for three hours.
Skim the surface and serve.
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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Turnip + carrottop 1% of all pairsSmell alikestrongCooked together8,002 recipes
Shared aroma: coumarin (sweet, hay).
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Turnip + oniontop 5% of all pairsSmell alikestrongCooked together7,585 recipes
Shared aroma: coumarin (sweet, hay).
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Carrot + oniontop 6% of all pairsSmell alikemoderateCooked together21,601 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Mutton + carrottop 18% of all pairsSmell alikelowCooked together1,878 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Mutton + oniontop 18% of all pairsSmell alikelowCooked together4,531 recipes
Shared aroma: 2,4-decadienal (seaweed).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mutton broth
- Forms the liquid base that carries the flavor of the whole soup.
- Onions
- Browning them in a pan builds sweetness and deep savory flavor in the soup.
- Turnips
- Add body and a mild sweetness as they soften during the long simmer.
- Carrots
- Add sweetness and color while softening into the broth during simmering.
The step that matters
Fry the onions until nicely browned. Browning drives the Maillard reaction and caramelization, which create the deep, savory flavor the broth lacks on its own. Pale onions leave the soup tasting flat.
Swap the onion
How well each one fits the dish's main ingredients (mutton, turnip, carrot):
- Leekfits better
- Parsnipfits better
- Beetrootfits better
- Onionthe original
Fit is the average pairing score against mutton, turnip, carrot. 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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