Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Liver “a LA Menagere.”
Ingredients
Directions
Prepare the liver
Cut the liver into thin slices.
In a skillet, melt butter and toss the liver with pepper, salt, and the bay leaf until browned.
Remove the liver and keep it warm.
Make the sauce and serve
In the same skillet, add chopped onions and cook until browned.
Sprinkle flour over the onions, then add stock and bring to a boil for 2 minutes.
Return the liver to the skillet and simmer until cooked through.
Stir in egg yolks and lemon juice, then serve immediately.
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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Pepper + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Pepper + oniontop 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).
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Butter + oniontop 15% of all pairsSmell alikemoderateCooked together42,912 recipes
Shared aroma: decanal (soap, orange peel).
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Liver + oniontop 15% of all pairsSmell alikelowCooked together1,420 recipes
Shared aroma: furaneol (caramel, strawberry).
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
- Is the main protein, cooked quickly so it stays tender and browned on the outside.
- Butter
- Browns the liver and onions and adds richness to the pan.
- Onions
- Soften and brown to add sweetness and savory depth to the sauce.
- Flour
- Thickens the stock into a smooth sauce as it cooks with the onions.
- Egg yolks
- Enrich and thicken the sauce, giving it a silkier body when stirred in.
- Lemon juice
- Adds acidity that brightens the rich butter and egg yolk sauce.
The step that matters
Stir in egg yolks and lemon juice, then serve immediately. Egg yolks thicken when heated but can curdle or scramble if the sauce boils after they are added. Keep the heat low and serve right away, as the sauce thins and sets as it cools.
Swap the onion
How well each one fits the dish's main ingredients (liver, butter, pepper, flour, egg, lemon):
- Shallotfits better
- Asparagusfits better
- Chivefits better
- Onionthe original
Fit is the average pairing score against liver, butter, pepper, flour, egg, 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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