Why it works: Flour and butter 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
In a saucepan, bring water to a boil.
Remove from heat and add butter, stirring until melted.
In a separate bowl, mix flour with a little water to form a smooth paste.
Gradually add the flour mixture to the saucepan, stirring constantly.
If the sauce is too thick, add more water; if too thin, mix additional flour with butter.
Return to heat and bring to a gentle boil, stirring until thickened.
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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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and butter 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
- All-purpose flour
- Thickens the liquid as its starch swells and sets into a smooth, creamy sauce.
- Unsalted butter
- Adds richness and smooth body, carrying flavour and helping the sauce feel silky.
The step that matters
Returning the sauce to a gentle boil while stirring. Flour starch only thickens fully once it reaches a boil and swells. Stirring keeps the starch dispersed so it does not clump or leave a lumpy, pasty texture.
“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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