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 tails
Wash the ox-tails and soak them.
Pour cold water over the ox-tails.
Bring the water to a boil gradually, then add salt to the pot.
Skim off the scum as it forms.
Make the broth
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.
Remove the ox-tails.
Strain the broth.
Skim off the fat.
Finish and serve
Cut the meat from the tails.
Serve in joints, adding to the stock.
When boiling, stir in a thickening of arrowroot or rice flour mixed with cayenne and salt to taste.
Serve 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).
-
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 gelatin-rich body that flavours the broth.
- Arrowroot or rice flour
- Thickens the broth as its starch swells when heated.
- Onions
- Add savoury sweetness and depth as they cook slowly in the stock.
- Carrots
- Contribute natural sweetness and body to the broth during long stewing.
The step that matters
Skim off the scum as it forms. Scum is coagulated protein and impurities that rise while the water heats. Removing it early keeps the broth clear and clean-tasting rather than cloudy or muddy.
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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