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 ↓
Cold Catsup
Ingredients
Directions
Mix all the ingredients together in a large bowl.
Use immediately or let it age for improved flavor.
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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Mustard + celerytop 2% of all pairsSmell alikemoderateCooked together4,169 recipes
Shared aroma: guaiacol (smoky, sweet).
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Tomato + celerytop 4% of all pairsSmell alikemoderateCooked together3,377 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Pepper + clovetop 5% of all pairsSmell alikestrongCooked together17,451 recipes
Shared aroma: ethyl octanoate (fruity, wine).
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Pepper + celerytop 5% of all pairsSmell alikestrongCooked together16,012 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Tomatoes
- Form the bulk of the ketchup and supply its main body and fruity base.
- Cider vinegar
- Adds acidity that gives the ketchup its tang and helps keep it stable.
- Sugar
- Adds sweetness that rounds out the sharpness of the vinegar and spices.
- Mustard seed
- Contributes a sharp, pungent bite and a seedy texture.
- Horseradish
- Adds a sharp, pungent heat that gives the sauce its bite.
- Red peppers
- Add sweet, mild body and flavour to the sauce.
Swap the mace
How well each one fits the dish's main ingredients (tomato, horseradish, mustard, pepper, celery, onion, clove):
- Thymefits better
- Capersfits better
- Tarragonfits better
- Macethe original
Fit is the average pairing score against tomato, horseradish, mustard, pepper, celery, onion, clove. 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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