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 Broth
Ingredients
Directions
Prepare the bone
Wash the beef bone thoroughly with hot and cold water.
Place the bone in a pot and cover with water.
Simmer
Bring to a boil, then reduce heat and simmer slowly for 3 to 4 hours.
Add onion, potato, or soup greens for flavor if desired.
Strain and serve
Strain the broth through a fine strainer or cheesecloth.
Serve hot or cold.
For added flavor and nutrition, stir in hot sterilized cream or an egg yolk 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.
Photo for illustrative purposes only · Contact us to use it
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).
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Beef + oniontop 7% of all pairsSmell alikemoderateCooked together17,092 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Beef + potatotop 8% of all pairsSmell alikemoderateCooked together2,052 recipes
Shared aroma: sotolon (curry, maple).
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Potato + creamtop 17% of all pairsSmell alikelowCooked together2,481 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
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Onion + creamtop 18% of all pairsSmell alikelowCooked together10,827 recipes
Shared aroma: 2-nonanone (fruity, floral).
Onion and cream barely smell alike, yet cooks put them together in 10,827 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Beef bone
- Releases collagen and minerals into the water, giving the broth body and savory flavor.
- Onion
- Adds aromatic sweetness and depth to the broth as it simmers.
- Potato
- Adds starch that lightly thickens the broth and mellows its flavor.
- Hot sterilized cream
- Adds fat and richness, softening the broth's flavor and mouthfeel.
- Egg yolk
- Adds fat and emulsifying proteins that enrich the broth's texture.
The step that matters
Simmer slowly without a hard boil. A gentle simmer extracts collagen and flavor while keeping the broth clear. A rolling boil emulsifies fats into the liquid and makes it cloudy.
Swap the onion
The recipe marks onion as optional. How well each one fits the dish's main ingredients (beef, potato, cream, egg):
- Chivefits about as well
- Asparagusfits about as well
- Onionthe original
- Leekfits about as well
Fit is the average pairing score against beef, potato, cream, egg. 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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