Why it works: Horseradish and shallot match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 376 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Boiled Carp
Ingredients
Directions
Poach the carp
Combine vinegar (or cider), water, horseradish, onion, salt, and sweet herbs in a large pot.
Bring the mixture to a boil.
Add the carp to the pot.
Boil the fish until cooked through.
Make the sauce
In a separate bowl, strain some of the cooking liquid.
Mix the strained liquid with minced liver, port wine, anchovies, shallots, salt, black pepper, cayenne, and soy sauce.
Boil the sauce.
Strain the sauce again.
Thicken the sauce with flour and butter.
Serve
Serve the boiled carp hot, topped with the sauce, garnished with fried roe, lemon slices, and parsley.
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 + shallottop 1% of all pairsSmell alikestrongCooked together376 recipes
Shared aroma: coumarin (sweet, hay).
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Horseradish + oniontop 7% of all pairsSmell alikestrongCooked together1,784 recipes
Shared aroma: coumarin (sweet, hay).
-
Onion + shallottop 8% of all pairsSmell alikestrongCooked together2,431 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Port wine + shallottop 9% of all pairsSmell alikemoderateCooked together380 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
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Horseradish + peppertop 11% of all pairsSmell alikemoderateCooked together2,646 recipes
Shared aroma: coumarin (sweet, hay).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Carp
- Is the main dish, cooked gently in the poaching liquid until it is firm and flaky.
- Flour and butter
- Thicken the strained sauce so it coats the fish instead of running off.
- Port wine
- Adds body, sweetness, and depth of flavour to the sauce.
- Liver
- Adds richness and a savoury, creamy body to the sauce.
- Vinegar or cider
- Provides acidity that sharpens the poaching liquid and balances the rich sauce.
The step that matters
Boil the fish until cooked through. Carp is delicate and overcooking makes the flesh dry and crumbly, while undercooking leaves it unsafe to eat. Watch for flesh that flakes easily when tested with a fork.
Swap the onion
How well each one fits the dish's main ingredients (vinegar, fish, horseradish, liver, port wine, shallot, pepper):
- Mustardfits better
- Chivefits better
- Capsicumfits better
- Onionthe original
Fit is the average pairing score against vinegar, fish, horseradish, liver, port wine, shallot, pepper. 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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