Why it works: Liver and fish work together. They rank in the top 9% of all ingredient pairs, and 79 recipes mention both. Both carry 2-nonenal, which smells fatty, green. The science ↓
The recipe
Ingredients
Contains: milk, wheat, fish (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Stew the liver in the fish gravy until tender.
Mince the liver finely and pound it in a mortar with dry mustard.
Thicken the gravy with butter rolled in flour.
Add the minced liver, salt, and chili vinegar to the gravy.
Bring to a boil and serve.
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 aroma chemistry they share, and how many recipes mention both.
-
Liver + fishtop 9% of all pairsAroma overlapmoderateMentioned together79 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Mustard + vinegartop 4% of all pairsAroma overlaplowMentioned together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Fish + buttertop 5% of all pairsAroma overlapstrongMentioned together4,432 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Butter + flourtop 6% of all pairsAroma overlaplowMentioned together122,858 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Liver + mustardtop 7% of all pairsAroma overlaplowMentioned together132 recipes
Shared aroma: guaiacol (smoky, sweet).
Mustard and vinegar share little aroma chemistry, yet 14,067 recipes mention both: they likely 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
- Liver
- Provides the main body and rich flavour of the sauce once minced and stewed.
- Flour
- Thickens the gravy when rolled with butter and stirred in.
- Butter
- Adds richness and helps flour thicken the gravy smoothly.
The step that matters
Thicken the gravy with butter rolled in flour. Flour must be cooked into the hot gravy so it swells and thickens evenly; adding it raw or in lumps leaves starchy clumps and a floury taste.
Flavor stand-ins for the mustard
How well each one fits the dish's main ingredients (liver, fish, butter, flour, vinegar):
- Shallotabout as good a flavor fit
- Potatoabout as good a flavor fit
- Onionabout as good a flavor fit
- Mustardthe original
Fit is the average pairing score against liver, fish, butter, flour, vinegar. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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
Illustration
Illustration
Illustration
IllustrationThe Sunday pairing: one pairing, the chemistry behind it, and how to cook it. No spam, unsubscribe anytime.
Prefer an account? Create a free account for sign-in; Pro adds the full results and chemistry.