Why it works: Flour and butter are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Calf's Liver
Ingredients
Directions
Prepare
Slice the calf's liver into ½ inch thick pieces.
Dust the slices with pepper and coarse sea salt.
Roll the slices in flour.
Cook
Heat bacon fat in a pan and cook the liver until nicely browned.
Alternatively, cover the liver with boiling water and let it stand for five minutes.
Season again with pepper and coarse sea salt, roll in flour, and fry in bacon fat or clarified butter.
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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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Pepper + flourtop 19% of all pairsSmell alikemoderateCooked together50,459 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Liver + buttertop 19% of all pairsSmell alikemoderateCooked together2,065 recipes
Shared aroma: guaiacol (smoky, sweet).
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Liver + peppertop 21% of all pairsSmell alikemoderateCooked together2,375 recipes
Shared aroma: 2-nonenal (fatty, green).
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Pepper + buttertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Flour and butter 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
- Calf's liver
- Forms the main body of the dish, giving a rich, tender bite when cooked properly.
- Flour
- Forms a thin coating that browns in the fat and helps the surface crisp.
- Bacon fat or clarified butter
- Conducts heat evenly and adds richness and browning to the liver's surface.
The step that matters
Avoid overcooking the liver. Liver is lean and its proteins tighten quickly under heat. Cooking it too long makes it dry, grainy and tough, so brown the slices quickly in hot fat and stop while the centre is still tender.
“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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