Why it works: Onion and potato are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Beef Soup
Ingredients
Directions
Make the soup
Boil the hock of beef in a large pot for 4–5 hours.
Skim off the scum and add the whole onions.
When nearly done, cut the meat from the bone into small pieces and return it to the pot.
Season with pepper, coarse sea salt, and sweet herbs.
Add sliced carrots and potatoes.
Make and cook the dumplings
Mix part potato with flour to make dumplings.
Shape the dumpling mixture into small pieces.
Boil the dumplings for 15–20 minutes.
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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Onion + potatotop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Carrot + potatotop 4% of all pairsSmell alikestrongCooked together3,107 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
-
Pepper + carrottop 6% of all pairsSmell alikestrongCooked together14,555 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + carrottop 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).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Hock of beef
- Gives the broth its rich, meaty flavour as it simmers for hours.
- Whole onions
- Release sweetness and aroma into the broth during long simmering.
- Potatoes
- Thicken the broth slightly as they break down and add body.
- Flour
- Binds the potato mixture so the dumplings hold their shape while boiling.
The step that matters
Skimming the scum. Foam that rises early contains coagulated proteins and impurities. Removing it keeps the broth clear and clean-tasting instead of cloudy or greasy.
Swap the onion
How well each one fits the dish's main ingredients (beef, pepper, carrot, potato, flour):
- Parsnipfits better
- Turnipfits better
- Capsicumfits about as well
- Onionthe original
Fit is the average pairing score against beef, pepper, carrot, potato, flour. 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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