Why 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, wheat (auto-detected from the ingredients and method; we can miss things, so check labels)
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.
Prepare
Cut cold potatoes into slices, not too thin.
Season with coarse sea salt, black pepper, and a little nutmeg.
Sprinkle ½ tablespoon flour for each pound of potatoes and add 1 tablespoon oil or butter.
Bake in a bag
Place in a buttered paper bag with ¾ cup milk.
Close the bag securely and place it on a wire grid in a 350°F (175°C) oven for about 20 minutes.
Serve
Slit open the bag and transfer the potatoes with the sauce to a hot dish.
Sprinkle with finely chopped parsley and serve.
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 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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Butter + milktop 3% of all pairsAroma overlapstrongMentioned together81,222 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Nutmeg + parsleytop 3% of all pairsAroma overlapstrongMentioned together5,062 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Potato + milktop 4% of all pairsAroma overlapstrongMentioned together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Potatoes
- Form the main body of the dish, softening into a tender interior as they bake.
- Flour
- Thickens the milk and butter or oil into a light sauce that coats the potato slices.
- Milk
- Forms the liquid base of the sauce, which thickens and turns creamy as it heats.
- Oil or butter
- Adds fat for richness and helps the flavor carry through the sauce.
The step that matters
Sealing the bag. A tightly closed bag traps steam so the potatoes cook through in their own moisture and the milk and flour form a sauce rather than drying out or scorching.
Flavor stand-ins for the nutmeg
How well each one fits the dish's main ingredients (potato, pepper, flour, butter, milk, parsley):
- Thymeabout as good a flavor fit
- Dillabout as good a flavor fit
- Marjoramabout as good a flavor fit
- Nutmegthe original
Fit is the average pairing score against potato, pepper, flour, butter, milk, parsley. 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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