Why it works: Turnip and leek match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,046 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Ox-tail Soup
Ingredients
Directions
Sauté the ox-tail joints in butter until lightly browned.
Add beef stock or water and bring to a simmer.
Season with whole black pepper and coarse sea salt.
Add sliced vegetables and herbs, especially if using water.
Cook until the meat is tender and falls off the bones.
Thicken the soup with browned flour if desired.
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 + leektop 1% of all pairsSmell alikestrongCooked together1,046 recipes
Shared aroma: coumarin (sweet, hay).
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Carrot + celerytop 1% of all pairsSmell alikestrongCooked together10,173 recipes
Shared aroma: myristicin (spice, warm).
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Carrot + turniptop 1% of all pairsSmell alikestrongCooked together8,002 recipes
Shared aroma: coumarin (sweet, hay).
-
Turnip + celerytop 2% of all pairsSmell alikemoderateCooked together4,418 recipes
Shared aroma: coumarin (sweet, hay).
-
Carrot + leektop 3% of all pairsSmell alikestrongCooked together1,310 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
- Ox-tails
- Provide the meat and gelatin-rich body that gives the soup its flavor and richness.
- Butter
- Carries browning in the pan, building savory flavor on the ox-tail joints.
- Beef stock
- Forms the liquid base of the soup and carries the flavor of the meat and vegetables.
- Browned flour
- Thickens the soup and adds a toasty, nutty note.
The step that matters
Browning the ox-tail joints. Sautéing the joints until lightly browned triggers the Maillard reaction, which builds deep savory flavor that carries into the broth.
Swap the onion
How well each one fits the dish's main ingredients (butter, beef, pepper, carrot, turnip, leek, celery):
- Parsnipfits better
- Chivefits about as well
- Lettucefits about as well
- Onionthe original
Fit is the average pairing score against butter, beef, pepper, carrot, turnip, leek, celery. 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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