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 ↓
Pepper Sauce
Ingredients
Directions
Infuse and combine
Boil the spices and sugar in 2 quarts of cider vinegar.
Pour the boiling mixture over the chopped cabbage and peppers.
Cook the sauce
Combine 4 dozen bell peppers, 2 quarts vinegar, and 1 quart water in a pot.
Add 3 tablespoons grated horseradish.
Add 5 chopped onions.
Boil until soft.
Strain through a sieve.
Season to taste with salt, spices, and mustard.
Boil for an additional 10 minutes.
Finish and bottle
Add celery seed.
Add strong pepper if desired.
Bottle and cork tightly.
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).
-
Cabbage + horseradishtop 2% of all pairsSmell alikestrongCooked together481 recipes
Shared aroma: coumarin (sweet, hay).
-
Cabbage + mustardtop 3% of all pairsSmell alikestrongCooked together1,645 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Pepper + clovetop 5% of all pairsSmell alikestrongCooked together17,451 recipes
Shared aroma: ethyl octanoate (fruity, wine).
-
Pepper + cabbagetop 5% of all pairsSmell alikemoderateCooked together4,081 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Peppers
- Provide the bulk of the sauce and its main body as they soften and break down.
- Cabbage
- Adds bulk and body, and softens into the sauce during cooking.
- Cider vinegar
- Provides acidity that preserves the sauce and sharpens its flavour.
- Horseradish
- Adds a sharp, pungent heat that fades somewhat with boiling.
- Mustard seed
- Contributes sharp, pungent flavour that mellows during cooking.
- Sugar
- Balances the sharpness of the vinegar with sweetness.
The step that matters
Boil until soft. Cooking until the peppers and onions are fully soft lets them break down so the sauce strains smoothly. Undercooked pieces stay firm, block the sieve and leave a coarse texture.
Swap the mace
How well each one fits the dish's main ingredients (pepper, cabbage, horseradish, mustard, clove, sugar, cider):
- Allspicefits better
- Cinnamonfits better
- Turmericfits better
- Macethe original
Fit is the average pairing score against pepper, cabbage, horseradish, mustard, clove, sugar, cider. 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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