Name: Horseradish Sauce
Ingredients: 1 horse-radish root; ¼ teaspoon coarse sea salt; ¼ teaspoon cayenne pepper; 1 teaspoon sugar; 1 teaspoon celery seed; as many mustard seeds as desired; 1 cup cider vinegar; 2 cloves; 2 grains of allspice

Why it works: Radish and mustard match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 297 recipes. Both carry eucalyptol, which smells eucalyptus, herbal. The science ↓

Horseradish Sauce

Ingredients

Directions

Prepare the horseradish

Scrape or grate the horse-radish root after cleaning the outer bark.
Spread the grated horse-radish on a dish.
Sprinkle the grated horse-radish with salt, cayenne pepper, sugar, celery seed, and mustard seeds.

Make the vinegar

Boil the cider vinegar with cloves and allspice.
Let the boiled vinegar cool.

Combine and bottle

Mix the cooled vinegar with the horse-radish mixture.
Transfer the mixture to wide-mouthed bottles.

Recipe from a historical cookbook (Internet Archive).

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.

Radish + mustardtop 1% of all pairs

Smell alikestrong

Cooked together297 recipes

Shared aroma: eucalyptol (eucalyptus, herbal).
Celery + mustardtop 2% of all pairs

Smell alikemoderate

Cooked together4,169 recipes

Shared aroma: guaiacol (smoky, sweet).
Horse + radishtop 4% of all pairs

Smell alikemoderate

Cooked together529 recipes

Shared aroma: 2-methylbutyraldehyde (malty, chocolate).
Pepper + celerytop 5% of all pairs

Smell alikestrong

Cooked together16,012 recipes

Shared aroma: 4'-methylacetophenone (bitter almond).
Cider + vinegartop 6% of all pairs

Smell alikemoderate

Cooked together3,431 recipes

Shared aroma: 4-ethyl-2-methoxyphenol (smoky, clove).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Horse-radish root: Supplies the sharp, pungent flavour that defines the sauce.
Cider vinegar: Adds acidity that sharpens the flavour and helps preserve the sauce.
Sugar: Balances the sharpness of the vinegar and horseradish with a touch of sweetness.
Mustard seeds: Contribute a mild, nutty pungency that complements the horseradish.

Swap the celery

How well each one fits the dish's main ingredients (horse, radish, pepper, sugar, mustard, cider, vinegar):

Allspicefits better
Turmericfits about as well
Cinnamonfits about as well
Celerythe original

Fit is the average pairing score against horse, radish, pepper, sugar, mustard, cider, vinegar. 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.