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 ↓
Melted Butter
Ingredients
Directions
Make the roux
Melt the butter in a saucepan over moderate heat.
Add the flour and stir to form a smooth paste.
Reduce the heat and cook the roux gently for a few minutes without browning.
Make the sauce
Gradually add the warm water or milk and water, along with the salt.
Increase the heat and stir with a wooden spoon until the sauce is soft and creamy.
Strain the sauce into a hot sauceboat.
Just before serving, add a pat of fresh butter to melt into the sauce.
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.
Photo for illustrative purposes only · Contact us to use it
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 + walnuttop 12% of all pairsSmell alikemoderateCooked together5,873 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 + walnuttop 15% of all pairsSmell alikemoderateCooked together6,832 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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
- Butter
- Enriches the sauce with fat, adding richness and a smooth mouthfeel.
- Flour
- Thickens the liquid into a smooth, creamy sauce as it cooks in the roux.
- Warm water or milk and water
- Forms the liquid base that the roux thickens into a pourable sauce.
The step that matters
Cooking the roux gently without browning. Cooking flour and butter gently lets the starch swell and lose its raw taste while keeping the sauce pale and clean-flavoured. Browning changes the colour and flavour, and rushing can leave lumps if the liquid is added too quickly.
Swap the walnut
How well each one fits the dish's main ingredients (butter, flour, milk):
- Almondfits better
- Pistachiofits about as well
- Chestnutfits about as well
- Walnutthe original
Fit is the average pairing score against butter, flour, milk. 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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