Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Mashed Potatoes
Ingredients
Directions
Prepare the potatoes
Boil or steam the potatoes until thoroughly cooked.
Drain the potatoes.
Let them dry.
Peel the potatoes.
Remove any specks.
While hot, pass the potatoes through a colander into a clean saucepan.
Mash and season
Warm the potatoes gently, stirring in the butter, milk, pepper, and salt.
Avoid making the mixture too wet.
Shape and brown
Optionally, place the mashed potatoes into buttered scallop shells or pudding molds.
Brush the tops with egg yolk and brown in a Dutch oven.
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 + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Potato + milktop 9% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
-
Potato + buttertop 13% of all pairsSmell alikemoderateCooked together6,456 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Potatoes
- Provide the starch and bulk that make up the body of the mash.
- Butter
- Adds fat for richness and a smooth, silky mouthfeel.
- Milk
- Adds moisture and loosens the mash to a creamy texture.
- Egg yolk
- Brushed on top, it promotes browning on the surface when baked.
The step that matters
Avoid making the mixture too wet. Excess liquid thins the mash and makes it loose and watery. Warming gently while stirring in the milk and butter lets the starch absorb the liquid evenly for a thick, creamy result.
Swap the potato
How well each one fits the dish's main ingredients (butter, milk, pepper, egg):
- Capsicumfits about as well
- Potatothe original
- Asparagusfits about as well
- Chivefits less well
Fit is the average pairing score against butter, milk, pepper, 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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