Why it works: Capers and tarragon match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 379 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Broto Butter Sauce
Ingredients
Directions
Chop the ancho pepper and capers very finely or pound them.
In a saucepan, melt the butter until it becomes brown.
Add the chopped ancho and capers to the butter.
Stir in the tarragon vinegar, Harvey's sauce, and a small amount of brown gravy.
Simmer for five minutes and serve with broiled or boiled fish.
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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Capers + tarragontop 1% of all pairsSmell alikestrongCooked together379 recipes
Shared aroma: coumarin (sweet, hay).
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Pepper + tarragontop 5% of all pairsSmell alikestrongCooked together2,399 recipes
Shared aroma: estragole (anise, licorice).
-
Tarragon + vinegartop 7% of all pairsSmell alikemoderateCooked together2,547 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Capers + saucetop 11% of all pairsSmell alikemoderateCooked together678 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Pepper + caperstop 12% of all pairsSmell alikemoderateCooked together2,088 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
- Butter
- Melts and browns to give the sauce a rich, nutty flavour and a fatty base.
- Ancho pepper
- Adds chopped pepper pieces and mild heat to the sauce.
- Capers
- Add a sharp, briny bite that cuts through the richness of the butter.
- Tarragon vinegar
- Adds acidity and tarragon aroma to balance the browned butter.
The step that matters
Melting the butter until it browns. Butter that is cooked too long can turn from brown to burnt, giving a bitter taste. Watching the colour closely lets the milk solids toast for nuttiness without scorching.
Swap the capers
How well each one fits the dish's main ingredients (pepper, butter, tarragon, vinegar, sauce):
- Parsleyfits about as well
- Capersthe original
- Thymefits about as well
- Marjoramfits less well
Fit is the average pairing score against pepper, butter, tarragon, vinegar, sauce. 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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