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 over medium heat.
Stir in the flour and cook until it begins to bubble.
Add the liquid and finish
Gradually add the boiling water while stirring continuously.
Season with salt and white pepper.
Continue stirring until the sauce boils, then serve.
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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Butter + white peppertop 28% of all pairsSmell alikelowCooked together3,814 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Flour + white peppertop 32% of all pairsSmell alikelowCooked together2,228 recipes
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 fat and rich flavor, and forms the base of the roux with the flour.
- Flour
- Thickens the sauce as its starch swells in the hot liquid.
The step that matters
Adding the boiling water. Pour the water in gradually while stirring constantly. Adding it all at once lets the flour clump before it can disperse, leaving lumps that are hard to smooth out.
Swap the white pepper
How well each one fits the dish's main ingredients (butter, flour):
- Jalapenofits better
- Capersfits better
- Nutmegfits better
- White pepperthe original
Fit is the average pairing score against butter, flour. Candidates are from the same food group and used in at least 100 recipes.
“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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