Why it works: Horseradish and mustard match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,832 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Hot Horseradish Sauce
Ingredients
Directions
Mix grated horseradish with brown gravy.
Let the mixture stand by the fire until just boiling.
Add salt, made mustard, and vinegar.
Optionally, stew horseradish in vinegar for 10 minutes.
Drain and mix with melted butter.
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 + mustardtop 1% of all pairsSmell alikestrongCooked together1,832 recipes
Shared aroma: coumarin (sweet, hay).
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Horseradish + garlictop 5% of all pairsSmell alikestrongCooked together719 recipes
Shared aroma: coumarin (sweet, hay).
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Mustard + garlictop 6% of all pairsSmell alikestrongCooked together4,053 recipes
Shared aroma: linalool (floral, citrus).
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Garlic + buttertop 22% of all pairsSmell alikemoderateCooked together10,572 recipes
Shared aroma: linalool (floral, citrus).
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Mustard + buttertop 22% of all pairsSmell alikemoderateCooked together8,003 recipes
Shared aroma: guaiacol (smoky, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Grated horseradish
- Provides the sharp, pungent heat that defines the sauce.
- Brown gravy
- Forms the liquid base that carries the horseradish and adds savoury depth.
- Made mustard
- Adds sharpness and a little heat that complements the horseradish.
- Vinegar
- Adds acidity that brightens the sauce and sharpens its flavour.
- Melted butter
- Adds richness and a smoother, fuller texture to the sauce.
The step that matters
Let the mixture stand by the fire until just boiling. Heating gently to just boiling warms the horseradish and softens its sharpness without cooking off its pungent aroma. Overheating or boiling too long dulls the flavour, and the sauce may split once butter is added.
Swap the garlic
How well each one fits the dish's main ingredients (horseradish, mustard, butter):
- Capersfits better
- Tarragonfits better
- Dillfits better
- Garlicthe original
Fit is the average pairing score against horseradish, mustard, butter. 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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