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 stock
Simmer the soup bone in a large kettle of water for 6 to 8 hours.
Remove the meat and strain the liquid.
Set the liquid aside until the next morning and remove the fat that has risen.
Finish the soup
At 10 o'clock, bring the stock to a boil.
Add the sliced onions, diced carrots, diced potatoes, and whole peppercorns.
Just before serving, add the tomato ketchup or strained tomatoes.
Cream the flour with the butter and stir it in just before serving.
Season with salt and pepper to taste.
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).
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Carrot + potatotop 4% of all pairsSmell alikestrongCooked together3,107 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
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Potato + tomatotop 5% of all pairsSmell alikestrongCooked together2,798 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Carrot + peppertop 6% of all pairsSmell alikestrongCooked together14,555 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Carrot + tomatotop 6% of all pairsSmell alikestrongCooked together3,606 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
- Soup bone
- Releases flavor and body into the water during long, slow simmering.
- Onions
- Add sweetness and savory depth as they cook into the broth.
- Potatoes
- Soften as they cook and thicken the soup slightly with their starch.
- Carrots
- Add sweetness and color, and hold their shape during simmering.
- Flour
- Creamed with butter and stirred in, it thickens the soup body.
- Tomato ketchup or strained tomatoes
- Add acidity, sweetness and color to the broth.
The step that matters
Stirring in the flour and butter just before serving. Flour added to hot liquid can clump, so creaming it with butter first and stirring it in near the end lets it disperse and thicken smoothly without lumps.
Swap the tomato
How well each one fits the dish's main ingredients (onion, carrot, potato, flour, butter, pepper):
- Leekfits better
- Chivefits better
- Parsnipfits better
- Tomatothe original
Fit is the average pairing score against onion, carrot, potato, flour, butter, 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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