Why it works: Turnip and arrowroot share more aroma than cooks usually use. They rank in the top 1% of all ingredient pairs, and cooks put them together in 64 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Ox-tail Soup
Ingredients
Directions
Prepare the broth
Wash and soak the ox-tails.
Pour cold water over the tails and bring to a boil gradually.
Add salt.
Skim off any scum that forms on the surface.
Once the scum ceases to rise, add carrots, onions, herbs, celery, turnips, cloves, and peppercorns.
Stew gently for 3 to 3½ hours, depending on the size of the tails.
Finish and serve
Remove the tails.
Strain the broth.
Skim off the fat.
Cut the meat from the tails.
Return it to the stock.
When the stock begins to boil, stir in a thickening of arrowroot or rice flour mixed with cayenne and salt to taste.
Serve the soup very hot.
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 + arrowroottop 1% of all pairsSmell alikestrongCooked together64 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).
-
Carrot + turniptop 1% of all pairsSmell alikestrongCooked together8,002 recipes
Shared aroma: coumarin (sweet, hay).
-
Celery + turniptop 2% of all pairsSmell alikemoderateCooked together4,418 recipes
Shared aroma: coumarin (sweet, hay).
-
Clove + peppertop 5% of all pairsSmell alikestrongCooked together17,451 recipes
Shared aroma: ethyl octanoate (fruity, wine).
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 rich flavour that give the soup its body.
- Arrowroot or rice flour
- Thickens the broth into a smooth, lightly body-filled soup when heated.
- Onions
- Add savoury sweetness and aromatic depth to the stock as it simmers.
- Carrots
- Contribute gentle sweetness and aroma to the long-simmered broth.
The step that matters
Skimming the scum and fat. Scum rises as the broth first heats and fat collects on top as it cooks. Removing scum before it breaks into the stock keeps the broth clear, and skimming fat after straining keeps the soup from tasting greasy.
Swap the onion
How well each one fits the dish's main ingredients (carrot, celery, turnip, clove, arrowroot, pepper):
- Parsnipfits better
- Beetrootfits better
- Leekfits better
- Onionthe original
Fit is the average pairing score against carrot, celery, turnip, clove, arrowroot, pepper. 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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