Why it works: Horseradish and tarragon share more aroma than cooks usually use. They rank in the top 4% of all ingredient pairs, and cooks put them together in 73 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Horseradish Sauce
Ingredients
Directions
Prepare
Grate the horseradish root finely until you have 1 cup.
Simmer the grated horseradish in 2 cups of broth.
In a bowl, beat the egg yolks with the tarragon vinegar.
Make the sauce
Thicken the broth over low heat with the egg yolk mixture.
Add the horseradish zest, pepper, salt, and nutmeg.
Serve hot in a sauceboat.
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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Horseradish + tarragontop 4% of all pairsSmell alikestrongCooked together73 recipes
Shared aroma: coumarin (sweet, hay).
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Tarragon + nutmegtop 4% of all pairsSmell alikestrongCooked together213 recipes
Shared aroma: estragole (anise, licorice).
-
Tarragon + peppertop 5% of all pairsSmell alikestrongCooked together2,399 recipes
Shared aroma: estragole (anise, licorice).
-
Pepper + nutmegtop 7% of all pairsSmell alikestrongCooked together13,015 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Tarragon + vinegartop 7% of all pairsSmell alikemoderateCooked together2,547 recipes
Shared aroma: isobutyraldehyde (malty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Grated horseradish root
- Provides the sharp, pungent heat that defines the sauce.
- Egg yolks
- Thicken the broth as they heat, giving the sauce a smooth, rich body.
- Broth
- Forms the liquid base that carries the horseradish flavor and is thickened into the sauce.
- Tarragon vinegar
- Adds acidity that brightens the sauce and balances the richness of the yolks.
The step that matters
Thicken the broth over low heat with the egg yolk mixture. Egg yolks set when heated, but at high heat or too quickly they can scramble and curdle. Gentle low heat and steady stirring keep the sauce smooth and thickened.
Swap the nutmeg
How well each one fits the dish's main ingredients (horseradish, egg, tarragon, vinegar, pepper):
- Dillfits better
- Parsleyfits better
- Capersfits better
- Nutmegthe original
Fit is the average pairing score against horseradish, egg, tarragon, vinegar, 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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