Why it works: Butter and cream are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 41,516 recipes. Both carry delta-dodecalactone, which smells sweet, creamy. The science ↓
Potatoes
Ingredients
Directions
Prepare the potatoes
Select potatoes of the same size.
Pare the potatoes and place them in cold water.
Boil the potatoes slowly until tender, checking with a fork.
Drain the water and add coarse sea salt.
Cover with a napkin to absorb steam and keep warm.
Mash and serve
For mashed potatoes, beat them smooth and mix with butter, cream or hot milk, and the yolk of an egg.
Place in a dish or scallop shells and warm in a saucepan, stirring constantly.
Brown the surface with a salamander if desired.
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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Butter + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Potato + buttertop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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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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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Cream + eggtop 24% of all pairsSmell alikelowCooked together42,166 recipes
Shared aroma: acetic acid (sour, vinegar).
Cream and egg barely smell alike, yet cooks put them together in 42,166 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
- Potatoes
- Provide the starchy base that softens and becomes fluffy when mashed.
- Butter
- Adds fat and richness, giving the mash a smooth, silky mouthfeel.
- Cream or hot milk
- Adds moisture and softness, loosening the mash to a smooth texture.
- Yolk of an egg
- Adds fat and emulsifiers that enrich the mash and help it hold together.
The step that matters
Boil the potatoes slowly until tender. Slow boiling cooks the potatoes evenly through, while rapid boiling can break the outside apart before the centre is soft. Starch that is fully cooked mashes smoothly, and overworking the hot potato releases more starch and makes it gluey.
Swap the potato
How well each one fits the dish's main ingredients (butter, cream, egg):
- Leekfits about as well
- Potatothe original
- Asparagusfits about as well
- Chivefits about as well
Fit is the average pairing score against butter, 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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