Why it works: Capers and cucumber match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and 303 recipes mention both. Both carry coumarin, which smells sweet, hay. The science ↓
A LA Tartare Sauce
Ingredients
Directions
Make the base
Boil the water in a pot.
Add the minced onion and butter; cook until thickened.
Remove from heat and stir in capers and chopped pickles.
Finish and serve
Mix in the mayonnaise dressing and lemon juice.
Serve with boiled salmon.
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.
-
Capers + cucumbertop 3% of all pairsAroma overlapstrongMentioned together303 recipes
Shared aroma: coumarin (sweet, hay).
-
Capers + lemontop 5% of all pairsAroma overlapstrongMentioned together1,222 recipes
Shared aroma: coumarin (sweet, hay).
-
Onion + caperstop 7% of all pairsAroma overlapstrongMentioned together1,381 recipes
Shared aroma: coumarin (sweet, hay).
-
Onion + cucumbertop 8% of all pairsAroma overlapstrongMentioned together6,050 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Cucumber + lemontop 9% of all pairsAroma overlapstrongMentioned together2,067 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mayonnaise dressing
- Forms the creamy, emulsified body of the sauce and carries the other flavors.
- Butter
- Adds richness and helps soften the onion gently for a smoother base.
- Capers
- Add briny, sharp bursts of flavor that cut through the richness.
- Chopped pickles
- Add tang and a crisp, chopped texture throughout the sauce.
- Lemon juice
- Adds acidity that brightens the sauce and balances the mayonnaise.
- Minced onion
- Contributes savory aroma and a mild bite as it cooks down.
The step that matters
Mix in the mayonnaise dressing and lemon juice. Mayonnaise is an emulsion of oil and egg that can separate and turn greasy when overheated. Stirring it in after the pan is off the heat keeps the sauce smooth and creamy.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (butter, capers, cucumber, lemon):
- Shallotbetter flavor fit
- Chivebetter flavor fit
- Kalebetter flavor fit
- Onionthe original
Fit is the average pairing score against butter, capers, cucumber, lemon. 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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