Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Smooth White Sauce for Boiled Mutton or Beef
Ingredients
Directions
Make the sauce
Mix the flour with a little cold milk.
When the milk comes to a boil, add the flour mixture and salt.
Once thickened, add the parsley and butter.
Serve
Have the chopped eggs ready in a sauceboat and pour the hot mixture over them.
Serve hot.
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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + parsleytop 12% of all pairsSmell alikemoderateCooked together16,675 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + parsleytop 15% of all pairsSmell alikemoderateCooked together28,563 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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
- Flour
- Thickens the milk into a smooth, pourable sauce as it heats.
- Butter
- Adds richness and a silky mouthfeel to the finished sauce.
- Boiling milk
- Forms the liquid base that the flour thickens into sauce.
- Hard boiled eggs
- Add body and texture to the sauce when poured over them.
The step that matters
Mixing the flour with cold milk first. Flour added directly to hot liquid clumps, because its starch granules swell unevenly on contact. Blending it into cold milk beforehand disperses the starch so the sauce stays smooth.
Swap the parsley
How well each one fits the dish's main ingredients (butter, flour, milk, egg):
- Nutmegfits better
- Cinnamonfits better
- Capersfits about as well
- Parsleythe original
Fit is the average pairing score against butter, 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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