Why it works: Potato and onion 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 ↓
Potato Soup
Ingredients
Directions
Prepare the potatoes
Peel potatoes and cover them with boiling water. Boil for 30 minutes.
Make the milk base
While potatoes boil, chop onion and celery, and boil them with milk.
Finish and serve
Drain potatoes and mash until light and fine.
Pour boiling milk over mashed potatoes, rub through a sieve, and serve immediately.
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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Potato + oniontop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Celery + peppertop 5% of all pairsSmell alikestrongCooked together16,012 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Potato + celerytop 7% of all pairsSmell alikemoderateCooked together2,047 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Onion + celerytop 7% of all pairsSmell alikemoderateCooked together18,518 recipes
Shared aroma: guaiacol (smoky, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Potatoes
- Provide the starchy body that thickens the soup when mashed.
- Milk
- Supplies the liquid base and creamy texture of the soup.
- Onion
- Adds savory aroma and sweetness as it softens in the milk.
- Celery
- Contributes a mild, fresh aroma to the soup base.
- Butter
- Adds fat for richness and a smoother mouthfeel.
The step that matters
Rubbing the mashed potatoes through a sieve. Pushing the mash through a sieve breaks up any remaining lumps and gives the soup a smooth, fine texture. Adding the hot milk first helps the potato blend evenly without seizing.
Swap the celery
How well each one fits the dish's main ingredients (potato, milk, onion, butter, pepper):
- Garlicfits better
- Parsleyfits better
- Thymefits better
- Celerythe original
Fit is the average pairing score against potato, milk, onion, 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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