Why it works: Tarragon and chervil match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 824 recipes. Both carry estragole, which smells anise, licorice. The science ↓
Cambridge Sauce
Ingredients
Directions
In a mortar, combine the egg yolks, anchovies, capers, tarragon, chervil, chives, and burnet.
Pound the mixture well, then add the mustards, pepper, and salt.
Moisten with salad oil and tarragon vinegar until the sauce is thick.
Transfer the sauce to a tammy placed over a dish and rub it through to achieve a smooth consistency.
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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Tarragon + cherviltop 1% of all pairsSmell alikestrongCooked together824 recipes
Shared aroma: estragole (anise, licorice).
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Chervil + chivetop 1% of all pairsSmell alikestrongCooked together370 recipes
Shared aroma: coumarin (sweet, hay).
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Capers + cherviltop 1% of all pairsSmell alikestrongCooked together135 recipes
Shared aroma: coumarin (sweet, hay).
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Capers + mustardtop 1% of all pairsSmell alikestrongCooked together624 recipes
Shared aroma: coumarin (sweet, hay).
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Capers + chivetop 1% of all pairsSmell alikestrongCooked together245 recipes
Shared aroma: coumarin (sweet, hay).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Hard-boiled yolks form the thick, creamy body of the sauce.
- Salad oil
- Oil emulsifies into the pounded yolks, adding richness and thickening the sauce.
- Anchovies (in the method)
- Adds a salty, savoury depth that rounds out the sauce.
- Mustard
- Adds sharpness and a pungent bite that cuts the richness of the yolks and oil.
- Tarragon vinegar
- Adds acidity and aroma, brightening the rich yolk and oil base.
The step that matters
Moisten with oil and vinegar gradually. Oil must be added slowly to pounded yolks so it emulsifies into a stable, thick sauce; adding it too fast causes it to separate and turn greasy.
Swap the mustard
How well each one fits the dish's main ingredients (egg, anchovy, capers, tarragon, chervil, chive, pepper):
- Shallotfits better
- Lettucefits better
- Mustardthe original
- Beetrootfits about as well
Fit is the average pairing score against egg, anchovy, capers, tarragon, chervil, chive, pepper. 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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