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 ↓
Butter Sauce
Ingredients
Directions
Mix the flour with cold water until smooth.
Stir the mixture into boiling water.
Add a pinch of salt and let it boil briefly.
Add the butter and stir until melted.
Do not allow the sauce to boil after adding the butter.
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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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
- Flour
- Thickens the water into a smooth sauce as its starch swells when heated.
- Butter
- Adds richness and a silky texture as it melts into the sauce.
The step that matters
Do not boil the sauce after adding the butter. Once butter is stirred in, boiling can split the emulsion, leaving the sauce greasy and grainy instead of smooth. Keeping it below a boil preserves a glossy, cohesive 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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