Why it works: Flour and capers match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 1,024 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Herring Sauce
Ingredients
Directions
Prepare
Wash the herring in cold water and chop finely.
Make the sauce
Heat the fat in a pan and brown the flour.
Add the chopped onion and cook until soft.
Stir in the soup stock and bring to a boil.
Add the herring, vinegar, and sugar and boil for a few minutes.
Strain the sauce through a fine sieve.
Stir in the capers and white wine and bring to a boil again.
Thicken the sauce with the egg yolks.
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.
-
Flour + caperstop 6% of all pairsSmell alikestrongCooked together1,024 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Onion + caperstop 7% of all pairsSmell alikestrongCooked together1,381 recipes
Shared aroma: coumarin (sweet, hay).
-
Vinegar + white winetop 11% of all pairsSmell alikemoderateCooked together1,776 recipes
Shared aroma: beta-damascenone (apple, rose).
-
Onion + white winetop 12% of all pairsSmell alikemoderateCooked together4,535 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + vinegartop 14% of all pairsSmell alikemoderateCooked together18,226 recipes
Shared aroma: acetic acid (sour, vinegar).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Herring
- Provides the main fish flavour that defines the sauce.
- Flour
- Browned in fat to form a roux that thickens the sauce.
- Egg yolks
- Enrich and thicken the sauce when stirred in near the end.
- Capers
- Add a sharp, briny acidity that cuts the richness.
- Onion
- Softened to add sweetness and aromatic depth to the base.
The step that matters
Thicken the sauce with the egg yolks. Egg yolks thicken through gentle heat; if the sauce boils after they are added, the proteins can scramble and curdle, leaving a grainy texture. Add them off the boil or over very low heat.
Swap the onion
How well each one fits the dish's main ingredients (flour, vinegar, sugar, capers, white wine, egg):
- Shallotfits better
- Mustardfits better
- Arrowrootfits better
- Onionthe original
Fit is the average pairing score against flour, vinegar, sugar, capers, white wine, egg. 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Tomato Soup526 recipes
Brown Bread461 recipes
Mutton Broth292 recipes
Yorkshire Pudding264 recipes