Why it works: Parsley and chive match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 2,150 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Poached Eggs
Ingredients
Directions
Poach the eggs
Poach the eggs in boiling water with vinegar for 3 minutes.
Lift the eggs out with a skimmer and place them on well-buttered toast.
Make the sauce
Melt 1 tablespoon of butter and 1 tablespoon of flour in a saucepan until bubbling.
Quickly pour in ½ pint of hot milk while stirring until it boils.
Add 1 teaspoon of chopped parsley, ½ teaspoon of chives or onion, and ¼ teaspoon of salt to the sauce.
Let the sauce boil for 5 minutes, then pour it over the eggs and toast.
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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Parsley + chivetop 3% of all pairsSmell alikestrongCooked together2,150 recipes
Shared aroma: coumarin (sweet, hay).
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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Flour + chivetop 8% of all pairsSmell alikestrongCooked together1,168 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + parsleytop 12% of all pairsSmell alikemoderateCooked together16,675 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 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
- Eggs
- Set in boiling water with vinegar, they form the main dish on the toast.
- Butter
- Enriches the sauce and coats the toast, adding richness and flavour.
- Flour
- Thickens the butter and milk into a smooth white sauce.
- Milk
- Forms the liquid base of the sauce, giving it body and creaminess.
The step that matters
Stirring the sauce as the milk goes in. Adding hot milk quickly while stirring keeps the flour and butter mixture smooth, preventing lumps. Letting the sauce boil afterward fully cooks the flour, so it thickens and loses its raw taste.
Swap the parsley
How well each one fits the dish's main ingredients (egg, vinegar, butter, flour, milk, chive):
- Capersfits better
- Tarragonfits better
- Nutmegfits about as well
- Parsleythe original
Fit is the average pairing score against egg, vinegar, butter, flour, milk, chive. 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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