Why it works: Mustard and vinegar are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 14,067 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Fresh Herrings
Ingredients
Directions
Grill the herring
Remove the gills from the herrings and place them on a grill over a bright fire.
Broil for 10 to 12 minutes, depending on size.
Make the mustard sauce
For the sauce, knead the baked flour and mustard powder with the butter.
Stir in the boiling water and boil for 5 minutes.
Add the vinegar and serve the sauce hot with the herrings.
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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Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + mustardtop 13% of all pairsSmell alikemoderateCooked together5,066 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Mustard + buttertop 22% of all pairsSmell alikemoderateCooked together8,003 recipes
Shared aroma: guaiacol (smoky, sweet).
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Butter + vinegartop 23% of all pairsSmell alikemoderateCooked together13,513 recipes
Shared aroma: isoamyl acetate (banana, pear).
Flour and butter barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Fresh herrings
- The main fish, whose oily flesh grills quickly and carries the flavour of the dish.
- Baked flour
- Thickens the sauce as its starch swells in the boiling water, giving it body.
- Butter
- Adds fat for richness and a smooth mouthfeel, and helps bind the flour and mustard.
- Mustard powder
- Provides the sharp, pungent flavour that defines the sauce.
- Vinegar
- Adds acidity that brightens the rich butter sauce and balances its heaviness.
The step that matters
Stir in the boiling water and boil for 5 minutes. The flour must be fully wetted and then boiled so its starch swells and thickens evenly. Adding water too slowly or not boiling long enough leaves lumps and a raw, floury taste.
Swap the mustard
How well each one fits the dish's main ingredients (flour, butter, vinegar):
- Shallotfits better
- Mustardthe original
- Chivefits about as well
- Cucumberfits about as well
Fit is the average pairing score against flour, butter, 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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