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.
Stir in the sifted flour until it forms a thin, firm paste.
Cook over low heat for 15 minutes without letting it brown.
Store
Pour into a jar and store for future use.
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.
-
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
- Carries fat that coats the flour particles and gives the roux a rich, smooth base.
- Flour
- Starch that thickens the fat into a paste and, once cooked, sauces it through gelatinization.
The step that matters
Cook over low heat without browning. Cooking gently for the full time cooks out the raw flour taste while keeping the roux pale. Higher heat can scorch it and give a darker color and a different flavor.
“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.
You might also like
Green Corn Pudding64 recipes
Cornmeal mush12 recipesThe free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.