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 ↓
Soallopbd Potatoes
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Assemble
Peel and dice the raw potatoes.
Layer the potatoes, butter, pepper, and salt in a dish, then sprinkle a little flour on top.
Repeat the layers until the dish is full.
Pour in milk until it reaches the top layer of potatoes.
Cover the dish with a pan.
Bake and serve
Bake in a 350°F (175°C) oven for about two hours.
Remove the pan just before serving to let the potatoes brown.
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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Potato + milktop 9% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
-
Pepper + oniontop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Raw potatoes
- Form the bulk of the dish, becoming tender and creamy as they cook in the milk.
- Flour
- Thickens the milk into a sauce that binds the layers together.
- Milk
- Cooks into a sauce that coats the potatoes and keeps them moist.
- Butter
- Adds richness and helps the top layer brown.
The step that matters
Removing the cover before serving. The cover traps steam so the potatoes cook through gently. Uncovering near the end lets surface moisture evaporate and the top brown, which is the browning this dish relies on.
Swap the onion
The recipe marks onion as optional. How well each one fits the dish's main ingredients (potato, butter, pepper, flour, milk):
- Chivefits better
- Capsicumfits better
- Asparagusfits better
- Onionthe original
Fit is the average pairing score against potato, butter, pepper, flour, milk. 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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