Why it works: Parsley and pepper 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 ↓
Chicken Livers
Ingredients
Directions
Make the sauce base
Melt the butter in a skillet over medium heat.
Sauté the chopped onion until soft but not browned.
Add the chicken livers and parsley, cooking until the livers are done.
Remove the livers from the skillet and set aside.
Finish the sauce
Add hot water or stock to the skillet, scraping up any bits from the bottom.
Whisk in the flour to thicken the sauce.
Strain the sauce.
Season the sauce with salt and pepper.
Serve
Pour the sauce over the livers 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.
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Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Onion + chickentop 8% of all pairsSmell alikemoderateCooked together17,814 recipes
Shared aroma: gamma-nonanolactone (coconut, sweet).
-
Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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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
- Chicken livers
- Provide the main protein, cooking through to a tender texture in the skillet.
- Butter
- Adds fat and richness, and carries the onion flavor into the sauce.
- Flour
- Thickens the pan liquid into a smooth sauce as it whisks in.
- Onion
- Builds sweet, savory aroma as it softens in the butter.
- Hot water or stock
- Forms the liquid base of the sauce and lifts browned bits from the pan.
The step that matters
Whisk in the flour. Flour added to liquid can clump if not whisked in smoothly, leaving lumps. Whisking it into the hot liquid disperses the starch so it thickens evenly as the sauce heats.
Swap the onion
How well each one fits the dish's main ingredients (butter, chicken, liver, parsley, flour, pepper):
- Shallotfits better
- Carrotfits better
- Potatofits about as well
- Onionthe original
Fit is the average pairing score against butter, chicken, liver, parsley, flour, pepper. 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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