Why it works: Onion and vinegar are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 18,226 recipes. Both carry acetic acid, which smells sour, vinegar. The science ↓
Pickled Herring
Ingredients
Directions
Prepare the fish
Clean and wash the herring fish.
Place the fish in a colander and sprinkle with coarse sea salt. Let it stand for several hours.
Wash the fish again and dry it.
Roll the fish in flour and fry in hot fat or oil until golden.
Pickle and store
Serve warm with lemon or place in a stone jar.
Add bay leaves, whole black peppercorns, and raw onions to the jar.
Boil equal parts vinegar and water, then pour over the fish.
Add the fat used for frying to the jar.
If storing for several weeks, add extra fat to cover the fish and exclude air.
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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Onion + vinegartop 14% of all pairsSmell alikemoderateCooked together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
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Fish + lemontop 15% of all pairsSmell alikelowCooked together1,889 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Flour + lemontop 17% of all pairsSmell alikemoderateCooked together30,404 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + oniontop 17% of all pairsSmell alikemoderateCooked together32,460 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Fish + oniontop 19% of all pairsSmell alikelowCooked together1,924 recipes
Shared aroma: 2,4-decadienal (seaweed).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Herring fish
- Forms the main body of the dish, becoming firm and flaky when fried and pickled.
- Coarse sea salt
- Draws moisture out of the fish, firming its flesh before frying and pickling.
- Flour
- Forms a light coating that browns during frying and helps seal in moisture.
- Vinegar
- Adds acidity that preserves the fish and gives the pickle its sharp flavour.
- Raw onions
- Contributes sharp, pungent flavour that mellows as the fish pickles.
The step that matters
Pour the boiled vinegar and water over the fish. The pickling liquid must be equal parts vinegar and water as written. Its acidity preserves the fish, and covering the fish fully with fat when storing for weeks keeps air away and slows spoilage.
Swap the lemon
How well each one fits the dish's main ingredients (fish, flour, onion, vinegar):
- Avocadofits about as well
- Coconutfits about as well
- Lemonthe original
- Limefits about as well
Fit is the average pairing score against fish, flour, onion, 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.
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