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 ↓
White Sauce
Ingredients
Directions
Make the roux
Melt the butter in a saucepan until it bubbles.
Add the flour and allow it to cool slightly.
Thicken and season
Gradually add the liquid cold to the mixture, stirring constantly.
Heat the mixture to boiling, stirring rapidly until thickened, about five minutes.
Stir in the salt.
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).
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
- Liquid
- Forms the body of the sauce, and its starch-free water gelatinizes the flour as it heats.
- Butter
- Carries fat for flavor and coats the flour so it blends smoothly.
- Flour
- Thickens the sauce as its starch swells and sets when heated in liquid.
The step that matters
Gradually add the cold liquid while stirring constantly. Flour clumps when it meets liquid all at once. Adding cold liquid slowly while stirring disperses the starch evenly, so the sauce thickens smooth instead of lumpy.
“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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