Why it works: Barley and potato match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 165 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓
Plain Beef Soup
Ingredients
Directions
Make the broth
Wash the shank bone and break it in several places.
Place the bone in a pot of cold water without salt and bring to a slow boil.
Skim off the scum as it rises.
After half an hour, add the pearl barley and boil for 2.5 to 3 hours.
Finish and serve
Half an hour before serving, peel and slice the potatoes to ⅛ inch thick and add them to the pot.
Season with salt and pepper to taste.
If the soup is too rich, skim the fat from the top before serving.
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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Barley + potatotop 5% of all pairsSmell alikestrongCooked together165 recipes
Shared aroma: beta-damascenone (apple, rose).
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Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Barley + peppertop 13% of all pairsSmell alikemoderateCooked together897 recipes
Shared aroma: 2-nonenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Shank bone
- Releases collagen and flavour into the water as it simmers, giving the broth body.
- Pearl barley
- Thickens the broth slightly as its starch releases during the long simmer.
- Potatoes
- Add starch and body, softening into the soup while keeping their shape in slices.
The step that matters
Skimming the scum. Scum rising early is coagulated protein and impurities; removing it keeps the broth clear and clean-tasting rather than cloudy or bitter.
Swap the potato
How well each one fits the dish's main ingredients (barley, pepper):
- Leekfits better
- Capsicumfits better
- Carrotfits better
- Potatothe original
Fit is the average pairing score against barley, 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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