Why it works: Onion and horseradish match in chemistry and in kitchens. They rank in the top 7% of all ingredient pairs, and cooks put them together in 1,784 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Dutch Sauce
Ingredients
Directions
Make the base
Combine onion, horseradish, anchovies, elder vinegar, and second stock in a stewpan.
Boil for 10 minutes, then strain through a fine sieve.
Return the strained mixture to the stewpan.
Finish the sauce
Whisk the eggs to make a liaison.
Add the liaison to the sauce.
Heat the sauce on the fire until it comes to a boil.
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.
Photo for illustrative purposes only · Contact us to use it
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.
-
Onion + horseradishtop 7% of all pairsSmell alikestrongCooked together1,784 recipes
Shared aroma: coumarin (sweet, hay).
-
Horseradish + vinegartop 12% of all pairsSmell alikemoderateCooked together2,609 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Onion + vinegartop 14% of all pairsSmell alikemoderateCooked together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
-
Horseradish + eggtop 26% of all pairsSmell alikelowCooked together694 recipes
Shared aroma: 2-methylbutyraldehyde (malty, chocolate).
-
Vinegar + eggtop 33% of all pairsSmell alikelowCooked together12,922 recipes
Shared aroma: acetic acid (sour, vinegar).
Vinegar and egg barely smell alike, yet cooks put them together in 12,922 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Eggs
- Thicken the sauce as they set when the liaison is heated, giving it body.
- Anchovies
- Add savory depth and a salty, umami note to the sauce.
- Elder vinegar
- Adds acidity that sharpens the sauce and balances its richness.
- Onion
- Contributes aromatic flavor and sweetness as it cooks in the liquid.
The step that matters
Adding the liaison to the sauce. Egg yolks thicken only at moderate heat. If the sauce is too hot when the liaison goes in, the eggs can scramble and curdle, leaving a grainy texture instead of a smooth, thickened sauce.
Swap the onion
How well each one fits the dish's main ingredients (horseradish, vinegar, egg):
- Mustardfits better
- Cucumberfits better
- Shallotfits better
- Onionthe original
Fit is the average pairing score against horseradish, vinegar, egg. 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.

Horseradish Cream Sauce6 recipes
Wine Sauce (for stewed fruit)186 recipes
Caper Sauce180 recipes
Brown Sauce141 recipes