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 Puree
Ingredients
Directions
Prepare the potatoes
Prepare and boil the potatoes until tender.
Mash the potatoes and pass them through a vegetable sifter.
Season the puree
In a small saucepan, boil the chopped onion with black pepper and mace or nutmeg.
Stir in the boiled onion along with its water, salt, and celery salt.
Gradually add boiling water while stirring until the mixture is thick and porridge-like.
Enrich and serve
Cream the butter and beat in the egg yolk, then gradually add the cream.
Heat the puree on the stove and carefully stir in the butter, egg, and cream mixture.
Stir until it boils, then serve.
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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Potato + oniontop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Pepper + celerytop 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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Onion + celerytop 7% of all pairsSmell alikemoderateCooked together18,518 recipes
Shared aroma: guaiacol (smoky, sweet).
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Butter + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Potatoes
- Form the bulk of the puree, giving it body when mashed and thinned.
- Butter
- Adds richness and a smooth, silky mouthfeel to the puree.
- Egg yolk
- Enriches the puree and helps it set and hold together when heated.
- Cream
- Adds moisture and richness, softening the texture of the puree.
- Onion
- Contributes savoury flavour and aroma to the puree.
The step that matters
Adding the egg, butter and cream mixture. Egg yolk can curdle or scramble if it gets too hot or is added too quickly. Stirring it in gently over heat, and not letting it overheat, keeps the puree smooth and creamy.
Swap the mace
How well each one fits the dish's main ingredients (potato, onion, pepper, celery, butter, egg, cream):
- Parsleyfits better
- Tarragonfits better
- Thymefits better
- Macethe original
Fit is the average pairing score against potato, onion, pepper, celery, butter, egg, cream. 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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