Why it works: Mushroom and thyme are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 2,557 recipes. Both carry 1-octen-3-one, which smells mushroom, metallic. The science ↓
Bechamel or White Sauce
Ingredients
Directions
Prepare the base
Combine veal, bacon or ham, butter, onion, mace, mushrooms, thyme, and bay leaf in a stewpan.
Fry over low heat without browning.
Add flour to thicken.
Make the sauce
Pour in broth and cream.
Let it boil for 30 minutes, stirring constantly.
Strain through a soup strainer before serving.
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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Mushroom + thymetop 5% of all pairsSmell alikemoderateCooked together2,557 recipes
Shared aroma: 1-octen-3-one (mushroom, metallic).
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Onion + thymetop 7% of all pairsSmell alikemoderateCooked together11,171 recipes
Shared aroma: coumarin (sweet, hay).
-
Butter + mushroomtop 7% of all pairsSmell alikemoderateCooked together12,525 recipes
Shared aroma: trans-2-decenal (waxy, orange).
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Onion + mushroomtop 10% of all pairsSmell alikemoderateCooked together10,626 recipes
Shared aroma: 2,4-decadienal (seaweed).
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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
- Veal
- Gives a meaty, savory flavor to the sauce as it cooks in the butter.
- Bacon or ham
- Adds smoky, salty depth that seasons the sauce from within.
- Butter
- Carries the aromatics and adds richness to the base.
- Flour
- Thickens the liquid into a smooth, coating sauce.
- Broth
- Forms the main liquid that the flour thickens and the flavors are extracted into.
- Cream
- Adds fat and body, giving the sauce a rich, smooth texture.
The step that matters
Add the flour and keep stirring during the boil. Flour must be cooked briefly in the fat before liquid goes in, and constant stirring during the 30-minute boil prevents lumps and scorching on the pan base, keeping the sauce smooth.
Flavor stand-ins for the mace
How well each one fits the dish's main ingredients (veal, ham, butter, onion, mushroom, thyme, flour):
- Marjorambetter flavor fit
- Parsleybetter flavor fit
- Garlicbetter flavor fit
- Macethe original
Fit is the average pairing score against veal, ham, butter, onion, mushroom, thyme, flour. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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