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
Soak the liver slices in saltwater to extract the blood.
Mix the flour and salt together.
Coat the liver slices in the flour mixture.
Cook and serve
Fry the coated liver in hot butter until browned.
Just before serving, add coffee, cover tightly, and let stand for a moment.
Serve with slices of crisply fried English breakfast bacon.
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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Liver + buttertop 19% of all pairsSmell alikemoderateCooked together2,065 recipes
Shared aroma: guaiacol (smoky, sweet).
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Butter + coffeetop 23% of all pairsSmell alikemoderateCooked together2,442 recipes
Shared aroma: 2-furfurylthiol (coffee, roasted).
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Flour + coffeetop 23% of all pairsSmell alikelowCooked together2,141 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Liver + flourtop 28% of all pairsSmell alikelowCooked together1,418 recipes
Shared aroma: isobutyraldehyde (malty, green).
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
- Is the main protein, cooked quickly so it browns outside and stays tender inside.
- Flour
- Forms a thin coating that browns in the butter and helps the crust hold together.
- Butter
- Conducts heat for frying and adds browning and a rich flavor to the crust.
- Coffee
- Adds a bitter, roasted aroma and flavor to the liver at the end of cooking.
- English breakfast bacon
- Adds salty, smoky crispness as an accompaniment to the liver.
The step that matters
Fry the coated liver in hot butter until browned. Liver overcooks quickly and turns grainy and dry. Hot butter browns the flour coating fast, so the inside stays tender if the slices are not left in the pan too long.
“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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