Why it works: Onion and potato are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
White Soup
Ingredients
Directions
Prepare the broth
Chop the veal and mutton into small pieces.
Put them into a pot with water, onions, turnip, and salt.
Bring to a boil, skim thoroughly, and simmer for 3 hours.
Strain the soup and let it cool to remove the fat.
Finish and serve
Reheat the soup, stir in the potato flour mixed with milk or cream, and let it thicken.
Season to taste 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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Onion + potatotop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + turniptop 5% of all pairsSmell alikestrongCooked together7,585 recipes
Shared aroma: coumarin (sweet, hay).
-
Turnip + flourtop 7% of all pairsSmell alikestrongCooked together2,874 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Turnip + potatotop 8% of all pairsSmell alikemoderateCooked together562 recipes
Shared aroma: coumarin (sweet, hay).
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Potato + milktop 9% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- French potato flour
- Thickens the soup into a smooth, lightly body-rich texture as it heats.
- Veal
- Releases flavour and gelatin into the broth, giving it body as it simmers.
- Mutton
- Adds deeper meaty flavour to the broth during the long simmer.
- Milk or cream
- Adds richness and a mellow, creamy texture to the finished white soup.
The step that matters
Skim thoroughly after boiling. Foam and impurities rise to the surface as the broth comes to a boil. Removing them early keeps the soup clear and clean-tasting rather than greasy or cloudy.
Swap the turnip
How well each one fits the dish's main ingredients (veal, mutton, onion, potato, flour, milk):
- Leekfits better
- Chivefits better
- Carrotfits about as well
- Turnipthe original
Fit is the average pairing score against veal, mutton, onion, potato, flour, milk. 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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