Why it works: Pepper and parsley match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
String Beans, Bretonne
Ingredients
Directions
Make the sauce
Sauté the diced onion in butter until golden.
Stir in the flour and moisten with white broth.
Bring the mixture to a boil.
Skim off any foam.
Finish and serve
Add the whole boiled beans.
Simmer for a few seconds to heat the beans.
Season with salt, pepper, and nutmeg.
Sprinkle with chopped parsley.
Serve on a hot platter.
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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Pepper + parsleytop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Nutmeg + parsleytop 3% of all pairsSmell alikestrongCooked together5,062 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Onion + beanstop 7% of all pairsSmell alikestrongCooked together5,242 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Pepper + nutmegtop 7% of all pairsSmell alikestrongCooked together13,015 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Beans + parsleytop 8% of all pairsSmell alikestrongCooked together1,376 recipes
Shared aroma: linalool (floral, citrus).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Onion
- Softens and sweetens as it browns in butter, adding flavour to the base.
- Butter
- Carries the onion's flavour and adds richness to the sauce.
- Flour
- Thickens the broth into a smooth, lightly bodied sauce.
- White broth
- Forms the liquid of the sauce that coats the beans.
- Boiled beans
- Serve as the main vegetable, warmed through in the sauce.
The step that matters
Stir in the flour and moisten with broth. Adding the liquid gradually while stirring keeps the flour dispersed, so the sauce thickens smoothly instead of forming lumps.
Swap the onion
How well each one fits the dish's main ingredients (butter, flour, beans, pepper, nutmeg, parsley):
- Shallotfits better
- Parsnipfits better
- Spinachfits better
- Onionthe original
Fit is the average pairing score against butter, flour, beans, pepper, nutmeg, parsley. 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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