Why it works: Carrot and turnip 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
Make the soup
Stew the beef gently for 3 hours.
Add the sliced carrots and turnips to the pot.
Fry the sliced onions until golden brown.
Strain the soup over the fried onions.
Simmer for 1 more hour.
Serve
Serve the soup over toasted bread.
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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Carrot + turniptop 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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Beef + oniontop 7% of all pairsSmell alikemoderateCooked together17,092 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Beef + carrottop 10% of all pairsSmell alikemoderateCooked together6,606 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Beef
- Slow stewing breaks down connective tissue, giving the soup body and rich savoury flavour.
- Carrots
- Add natural sweetness and body to the broth as they soften during cooking.
- Turnips
- Contribute mild sweetness and soft texture to the broth as they cook.
- Onions
- Frying until golden brown adds sweetness and deep browned flavour to the soup.
The step that matters
Fry the onions until golden brown. Browning onions through the Maillard reaction and caramelisation builds deep, sweet flavour. Pale onions leave the soup tasting flat, while over-darkened ones turn bitter.
Swap the turnip
How well each one fits the dish's main ingredients (beef, carrot, onion, bread):
- Potatofits about as well
- Leekfits about as well
- Tomatofits about as well
- Turnipthe original
Fit is the average pairing score against beef, carrot, onion, bread. 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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