Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Sauce Blanche.
Ingredients
Directions
Melt the butter in a saucepan over low heat.
Stir in the flour or starch until well combined.
Add the water gradually while stirring continuously.
Once the sauce comes to a boil, remove it from the heat and season with salt.
If the sauce is too thick, add a little more water; if too thin, add more butter mixed with flour.
Just before serving, add a small splash of vinegar and stir vigorously.
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 + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + vinegartop 23% of all pairsSmell alikemoderateCooked together13,513 recipes
Shared aroma: isoamyl acetate (banana, pear).
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Flour + vinegartop 27% of all pairsSmell alikemoderateCooked together8,652 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
- Butter
- Adds fat and rich flavour, and helps the sauce feel smooth on the palate.
- Flour or starch
- Thickens the water into a smooth sauce as it heats and swells.
- Water
- Forms the liquid base that the thickener hydrates and turns into sauce.
- Vinegar
- Adds a small amount of acidity that brightens the flavour of the finished sauce.
The step that matters
Adding the water gradually while stirring continuously. Starch granules clump if liquid is added all at once. Gradual addition with constant stirring lets each granule hydrate evenly, giving a smooth sauce without lumps.
“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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