Why it works: Tomato and onion are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 20,633 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Larded Calf's Liver
Ingredients
Directions
Prepare
Wash the calf's liver well.
Insert the strips of bacon or ham into the surface of the liver using a larding pin.
Stew
In a pot, combine the liver, lard, sliced tomatoes or tomato ketchup, minced onions, and dried sweet marjoram.
Set the pot on hot coals in the corner of the fireplace.
Stew the mixture regularly and slowly for four hours.
Serve
Serve the liver with the gravy around it.
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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Tomato + oniontop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Tomato + marjoramtop 9% of all pairsSmell alikemoderateCooked together299 recipes
Shared aroma: 2-hexenal (green, leafy).
-
Onion + marjoramtop 12% of all pairsSmell alikemoderateCooked together2,056 recipes
Shared aroma: coumarin (sweet, hay).
-
Liver + oniontop 15% of all pairsSmell alikelowCooked together1,420 recipes
Shared aroma: furaneol (caramel, strawberry).
-
Liver + hamtop 17% of all pairsSmell alikelowCooked together298 recipes
Shared aroma: 4-ethyl-2-methoxyphenol (smoky, clove).
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, becoming tender and sliceable through slow stewing.
- Bacon or old ham
- Larded into the liver, adding savory fat and salty flavor that seasons the meat from within.
- Lard
- Adds fat that keeps the liver moist during long, gentle cooking.
- Tomatoes or tomato ketchup
- Adds acidity and sweetness that give the gravy its body and tangy flavor.
- Onion
- Releases sugars and aroma as it stews, flavoring the gravy.
The step that matters
Slow stewing for four hours. Long, gentle heat breaks down the liver's connective tissue so it becomes tender rather than tough. Stewing too hard or too fast can toughen the proteins and dry the meat, so the heat should stay low and steady.
Swap the marjoram
How well each one fits the dish's main ingredients (liver, ham, tomato, onion):
- Garlicfits better
- Thymefits better
- Celeryfits better
- Marjoramthe original
Fit is the average pairing score against liver, ham, tomato, onion. 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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