Why it works: Parsley and lemon match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 14,037 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓
Ragout of Liver
Ingredients
Directions
Prepare the liver
Heat the dripping in a frying pan.
Add the onion, parsley, and bacon, and cook until hissing hot.
Add the liver pieces and fry until brown, turning often.
Remove the liver and keep it warm in a covered dish.
Strain the gravy.
Make the sauce
Rinse the frying pan and return it to the heat with the gravy and the butter mixed with browned flour.
Stir until smooth and brown.
Gradually thin with boiling water and lemon juice.
Add the minced pickle and curry powder, and boil sharply.
Pour the sauce over the liver.
Add boiling water to the pan under the dish, cover, and let stand for 10 minutes 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 + lemontop 1% of all pairsSmell alikestrongCooked together14,037 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Parsley + flourtop 12% of all pairsSmell alikemoderateCooked together16,675 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Onion + buttertop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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
- Liver
- Forms the main body of the dish and browns on the outside while staying tender inside.
- Browned flour
- Thickens the gravy as it cooks with the fat, giving it body and a toasted flavour.
- Butter
- Adds richness and helps make a smooth, glossy base for the sauce.
- Onion
- Softens and sweetens in the hot fat, adding savoury depth to the gravy.
- Lemon juice
- Adds acidity that brightens the rich gravy and balances the fat.
The step that matters
Stir the browned flour into the gravy until smooth. Flour lumps form if it is not fully mixed into the fat and liquid, and adding the water too quickly can make the sauce lumpy. Stirring steadily while thinning gradually keeps the sauce smooth and lets the flour thicken evenly.
Swap the onion
How well each one fits the dish's main ingredients (parsley, liver, butter, flour, lemon):
- Shallotfits better
- Chivefits better
- Leekfits better
- Onionthe original
Fit is the average pairing score against parsley, liver, butter, flour, lemon. 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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