Why it works: Potato and milk are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 3,611 recipes. Both carry (e,z)-2,6-nonadienal, which smells cucumber, melon. The science ↓
Duchess Potatoes
Ingredients
Directions
Prepare the mixture
Boil the potatoes until tender, then let them cool.
Grate the cooled potatoes into a bowl.
Gradually mix in the flour and milk.
Add the eggs and mix until combined.
Fry and serve
Drop spoonfuls of the mixture into boiling lard.
Remove them when they are a delicate 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 + milktop 9% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Potato + flourtop 15% of all pairsSmell alikemoderateCooked together5,355 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Milk + eggtop 18% of all pairsSmell alikemoderateCooked together88,785 recipes
Shared aroma: 2-nonenal (fatty, green).
Flour and milk barely smell alike, yet cooks put them together in 78,219 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
- Provide the starchy bulk that gives the duchess potatoes their soft, tender interior.
- Flour
- Adds starch that thickens the mixture and helps it hold its shape when fried.
- Eggs
- Bind the mixture together and add richness and structure as they set.
- Milk
- Adds moisture that keeps the mixture soft and easy to shape.
- Boiling lard
- Conducts heat quickly to cook the mixture and browns its surface.
The step that matters
Remove them when they are a delicate brown. Browning comes from Maillard reactions and caramelising sugars at the surface. Frying too long darkens the outside quickly while the interior can dry out, so timing the removal matters.
Swap the potato
How well each one fits the dish's main ingredients (flour, milk, egg):
- Arrowrootfits better
- Asparagusfits about as well
- Chivefits about as well
- Potatothe original
Fit is the average pairing score against flour, milk, egg. 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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