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 Roux
Ingredients
Directions
Make the roux
Melt the butter slowly in a saucepan over low heat with a little water.
Stir in the flour until it forms a thick paste.
Simmer for 15 minutes, stirring constantly to prevent burning.
Store
Store in a cool place for up to 3 days.
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
- Butter
- Provides fat that coats the flour and carries flavor through the roux.
- All-purpose flour
- Its starch thickens the fat into a paste and later into the sauce.
The step that matters
Simmering while stirring constantly. Flour starch scorches quickly on the bottom of a pan. Constant stirring spreads heat evenly, prevents burning, and gives a smooth, usable roux.
“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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