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 ↓
Potato Souffle
Ingredients
Directions
The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Bake the potatoes
Scrub and wash the potatoes, then bake them in a 400°F (200°C) oven for 45 minutes.
Remove the potatoes, cut them in half lengthwise, and scoop out the pulp into a hot bowl.
Mash and fill
Mash the pulp until firm, then mix in the butter, milk, egg whites, salt, and pepper.
Fill the potato skins with the mixture and brush the tops with butter.
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).
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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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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 starchy bulk and body that hold the soufflé mixture and its skins together.
- Butter
- Adds fat for richness and a smoother, softer mash, and browns the tops.
- Milk
- Adds moisture that loosens the mash so it spreads and fills the skins easily.
- Egg whites
- Add protein that helps the mixture set and bind as it cooks.
The step that matters
Scoop the pulp into a hot bowl and mash it while warm. Hot potato starch absorbs butter and milk more readily, so the mash becomes smoother and less likely to turn stiff or lumpy when the other ingredients are added.
Swap the potato
How well each one fits the dish's main ingredients (butter, milk, egg, pepper):
- Capsicumfits about as well
- Potatothe original
- Asparagusfits about as well
- Chivefits less well
Fit is the average pairing score against butter, milk, egg, 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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