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 Soup
Ingredients
Directions
Make the soup
Mash the steamed or boiled potatoes to a smooth paste.
Gradually mix in the boiling broth.
Pass the soup through a strainer.
Return the soup to the heat.
Add pepper and salt.
Let it boil for five minutes.
Skim off any black scum that rises to the surface.
Add minced and fried onions to the soup.
Stew for ten minutes before serving.
Serve
Serve hot with fried or toasted bread.
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.
Photo for illustrative purposes only · Contact us to use it
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 + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Pepper + oniontop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + breadtop 15% of all pairsSmell alikemoderateCooked together8,676 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Potato + breadtop 15% of all pairsSmell alikemoderateCooked together434 recipes
Shared aroma: 2-acetyl-1-pyrroline (popcorn, roasted).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mealy potatoes
- Their starch breaks down into a smooth, thickening body when mashed and simmered.
- Broth
- Provides the liquid base and savory flavor that the mashed potato suspends in.
- Onions
- Add aromatic sweetness and a fried, savory note to the finished soup.
The step that matters
Skim off any black scum that rises to the surface.. Impurities and proteins rise as scum during boiling and can cloud the soup and taste bitter. Removing them while the soup is still simmering keeps the broth clean and clear.
Swap the onion
The recipe marks onion as optional. How well each one fits the dish's main ingredients (potato, pepper, bread):
- Capsicumfits better
- Tomatofits better
- Carrotfits better
- Onionthe original
Fit is the average pairing score against potato, pepper, bread. 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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