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
Make the sauce
In a stewpan, melt 2 ounces of butter.
Add the flour and stir for 1 minute without browning.
Gradually add the boiling water, stirring until smooth, and boil for about 2 minutes.
If not perfectly smooth, pass the sauce through a sieve.
Finish and serve
Add the remaining butter, cut into pieces, and stir until melted.
Serve immediately.
Optionally, add a little lemon juice or a few drops of vinegar for flavor.
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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Flour + peppertop 19% of all pairsSmell alikemoderateCooked together50,459 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + peppertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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 richness and a smooth, silky mouthfeel to the sauce.
- Flour
- Thickens the liquid into a smooth sauce as its starch swells when heated.
The step that matters
Add the boiling water gradually while stirring. Adding liquid slowly while stirring lets the flour starch disperse evenly before it thickens, preventing lumps that are hard to remove later.
“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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