Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Swedish Fried Liver
Ingredients
Directions
Prepare the liver
Soak the liver slices in cold water for 15 minutes.
Cook the liver
Heat butter in a skillet over medium heat.
Add the liver to the skillet and season with salt, pepper, and chopped onion.
Dust a little flour over the liver and cover the skillet to retain steam.
Add a little water while cooking to prevent burning.
When browned, flip the liver and season with more salt, pepper, and flour.
Once cooked, remove the liver to a platter.
Make the sauce and serve
In the skillet, add 1 cup of sweet milk.
If the sauce is not thick enough, mix in more flour with milk until it reaches gravy consistency.
Pour the sauce over the liver and serve.
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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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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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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 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).
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
- Its protein sets and browns in the hot butter, giving the dish its main body and texture.
- Flour
- Dusted on the liver and whisked into the milk, it thickens the pan juices into a gravy.
- Sweet milk
- Forms the liquid base of the sauce, adding moisture and a mild, creamy richness.
- Butter
- Fat for frying that browns the liver surface and adds rich flavor.
- Onion
- Chopped onion cooked with the liver adds savory aroma and mild sweetness.
The step that matters
Flipping and browning the liver. Liver turns dry and tough if overcooked, so it should brown well on both sides and then be removed promptly once just cooked through. Cooking it too long makes it grainy and firm.
Swap the onion
How well each one fits the dish's main ingredients (liver, butter, pepper, flour, milk):
- Potatofits better
- Capsicumfits better
- Chivefits about as well
- Onionthe original
Fit is the average pairing score against liver, butter, pepper, flour, milk. 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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