Why it works: Pepper and parsley match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Grilled Herrings
Ingredients
Directions
Prepare
Scale and wash the herrings, then dry them.
Grill and make the sauce
Place the herrings on a grill to cook.
In a saucepan, combine butter, flour, vinegar, French mustard, water, ordinary mustard, pepper, and salt.
Heat the mixture, stirring until smooth and thickened.
Boil for five minutes, then pour the sauce over the grilled fish.
Serve
Garnish with parsley before serving.
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.
-
Pepper + parsleytop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Vinegar + mustardtop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Mustard + parsleytop 8% of all pairsSmell alikestrongCooked together2,588 recipes
Shared aroma: trans-2-hexenal (green, leafy).
-
Mustard + peppertop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour 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
- Herrings
- The main fish, whose oily flesh cooks on the grill and carries the dish.
- Butter
- Adds richness and a smooth, silky body to the sauce.
- Flour
- Thickens the sauce as it heats, giving it body.
- French mustard
- Adds sharp, pungent flavour that cuts through the richness of the fish and butter.
- Vinegar
- Adds acidity that brightens the sauce and balances the butter.
The step that matters
Stirring the sauce as it heats. Flour thickens only when heated with constant stirring; if left still, it can lump or scorch before the sauce turns smooth.
Swap the mustard
How well each one fits the dish's main ingredients (butter, flour, vinegar, pepper, parsley):
- Shallotfits better
- Chivefits about as well
- Capsicumfits about as well
- Mustardthe original
Fit is the average pairing score against butter, flour, vinegar, pepper, parsley. 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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