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 Pan-cakes
Ingredients
Directions
Prepare the batter
Grate the potatoes and place them in a bowl.
Add salt, beaten egg, and chopped onion to the potatoes.
If the mixture is watery, add a little flour; otherwise, skip this step.
Fry
Heat oil in a skillet and fry spoonfuls of the mixture until golden brown on both sides.
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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Potato + flourtop 15% of all pairsSmell alikemoderateCooked together5,355 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Onion + flourtop 17% of all pairsSmell alikemoderateCooked together32,460 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Potato + eggtop 29% of all pairsSmell alikemoderateCooked together4,978 recipes
Shared aroma: (e)-2-octenal (fatty, green).
Egg and flour barely smell alike, yet cooks put them together in 106,462 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
- Form the bulk of the pancake and provide its starchy structure once fried.
- Egg
- Binds the grated potato together so the pancakes hold their shape.
- Onion
- Adds moisture and savory flavor to the batter.
- Flour
- Absorbs excess moisture from the grated potato so the batter holds together.
The step that matters
Fry until golden brown on both sides. Grated potato releases water and browns slowly; the pancakes need enough hot oil and time to crisp and brown properly. Frying too cool makes them greasy and soft in the centre.
Swap the onion
How well each one fits the dish's main ingredients (potato, egg, flour):
- Chivefits better
- Asparagusfits better
- Leekfits better
- Onionthe original
Fit is the average pairing score against potato, egg, flour. 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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