IllustrationWhy it works: Potato and parsley match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and 2,855 recipes mention both. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
The recipe
Ingredients
Contains: milk (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Prepare
Boil six large potatoes.
Mash them very fine.
Make the soup
Add one pint of boiling water, salt, pepper, and one quarter pound of butter.
Let it boil well.
Add one pint of new milk or cream, and a little parsley.
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. See the original page.
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Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.
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Potato + parsleytop 3% of all pairsAroma overlapstrongMentioned together2,855 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Pepper + parsleytop 2% of all pairsAroma overlapstrongMentioned together34,118 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Milk + buttertop 3% of all pairsAroma overlapstrongMentioned together81,222 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Milk + potatotop 4% of all pairsAroma overlapstrongMentioned together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
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Potato + peppertop 5% of all pairsAroma overlapstrongMentioned together8,303 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
- Potatoes
- Their starch gives the soup body and thickens it as they break down.
- Butter
- Adds fat for richness and a smooth, rounded mouthfeel.
- Milk
- Adds creaminess and a mild dairy sweetness to the soup.
The step that matters
Mash the potatoes very fine. Potato starch cells break open when mashed. Mashing finely gives a smooth texture, while overworking can release too much starch and make the soup gluey.
Flavor stand-ins for the parsley
How well each one fits the dish's main ingredients (milk, butter, potato, pepper):
- Parsleythe original
- Thymeabout as good a flavor fit
- Cinnamonabout as good a flavor fit
Fit is the average pairing score against milk, butter, potato, pepper. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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