Why it works: Capers and tarragon match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and 379 recipes mention both. Both carry coumarin, which smells sweet, hay. The science ↓
Piquante Sauce
Ingredients
Directions
Prepare and reduce
Mince the onion and halve the capers.
Simmer the onion and capers in the vinegar until nearly evaporated.
Finish
Add the gravy and salt if necessary.
Serve very hot.
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 aroma chemistry they share, and how many recipes mention both.
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Capers + tarragontop 1% of all pairsAroma overlapstrongMentioned together379 recipes
Shared aroma: coumarin (sweet, hay).
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Onion + caperstop 7% of all pairsAroma overlapstrongMentioned together1,381 recipes
Shared aroma: coumarin (sweet, hay).
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Vinegar + tarragontop 7% of all pairsAroma overlapmoderateMentioned together2,547 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Onion + tarragontop 12% of all pairsAroma overlapmoderateMentioned together1,568 recipes
Shared aroma: coumarin (sweet, hay).
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Onion + vinegartop 14% of all pairsAroma overlapmoderateMentioned together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Onion
- Softens as it simmers, adding mild sweetness and savoury depth to the sauce.
- Capers
- Add a briny, sharp bite that cuts through the richness of the gravy.
- Vinegar
- Supplies acidity that brightens the sauce as it reduces.
- Brown meat gravy
- Forms the body of the sauce and provides its savoury meat flavour.
The step that matters
Reduce the vinegar until nearly evaporated. Simmering cooks off most of the vinegar's harsh sharpness and concentrates the flavour of the onion and capers. Stopping too early leaves the sauce sour; the reduction must be finished before the gravy goes in so the acidity stays balanced.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (capers, vinegar, tarragon, meat):
- Shallotbetter flavor fit
- Mustardbetter flavor fit
- Lettucebetter flavor fit
- Onionthe original
Fit is the average pairing score against capers, vinegar, tarragon, meat. 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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