Why it works: Parsley and pepper match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Stewed Kidneys
Ingredients
Directions
Prepare and make the gravy
Halve the kidneys.
Melt the butter in a pan over medium heat.
Add the flour and cook until browned.
Pour in the stock, then add parsley, Worcestershire sauce, salt, and pepper.
Stew and serve
Bring to a boil, then add the kidneys.
Stew slowly for one hour.
Arrange the kidneys on a hot dish and pour the gravy over.
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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Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + parsleytop 12% of all pairsSmell alikemoderateCooked together16,675 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + saucetop 15% of all pairsSmell alikelowCooked together15,338 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Butter + parsleytop 15% of all pairsSmell alikemoderateCooked together28,563 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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
- Sheep kidneys
- Form the main body of the dish and become tender with slow stewing.
- Butter
- Provides fat for cooking the flour and adds rich flavour to the gravy.
- Flour
- Thickens the gravy as its starch swells in the hot stock, and browning adds nutty flavour.
- Stock
- Forms the liquid base of the gravy and keeps the kidneys moist while stewing.
- Worcestershire sauce
- Adds savoury, tangy depth to the gravy.
The step that matters
Stew slowly for one hour. Gentle, low simmering lets the kidneys become tender and keeps the gravy smooth. A hard, rolling boil toughens the meat and can make the gravy break or stick, so keep the heat low once the kidneys are in.
Swap the parsley
How well each one fits the dish's main ingredients (butter, flour, pepper, sauce):
- Capersfits about as well
- Parsleythe original
- Jalapenofits about as well
- Tarragonfits about as well
Fit is the average pairing score against butter, flour, pepper, sauce. 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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