Why it works: Ketchup and sauce match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,099 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓
Stewed Kidneys
Ingredients
Directions
Prepare
Wash the kidney well and cut it into thin slices.
Roll the slices in flour, pepper, and salt, then brown quickly in the butter.
Stew
Transfer the kidney slices to a stewpan, add the stock and sauces, and simmer slowly for 1.5 hours.
Mix the rice with a little cold stock or water, add it to the stew, and cook for a few more minutes.
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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Ketchup + saucetop 1% of all pairsSmell alikestrongCooked together1,099 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Butter + mushroomtop 7% of all pairsSmell alikemoderateCooked together12,525 recipes
Shared aroma: trans-2-decenal (waxy, orange).
-
Mushroom + ricetop 9% of all pairsSmell alikestrongCooked together1,515 recipes
Shared aroma: 2,4-nonadienal (fatty, green).
-
Pepper + mushroomtop 11% of all pairsSmell alikemoderateCooked together13,580 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Pepper + ricetop 12% of all pairsSmell alikemoderateCooked together8,379 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Ox kidney
- Forms the main body of the dish and becomes tender with slow simmering.
- Flour
- Coats the slices so they brown and help thicken the stock into a sauce.
- Butter
- Browns the flour-coated slices quickly, adding richness and colour.
- Second stock
- Provides the liquid that carries flavour and gives the stew its body.
- Rice
- Absorbs liquid and thickens the stew as it cooks.
- Worcestershire sauce
- Adds savoury, tangy depth that rounds out the stew's flavour.
The step that matters
Simmering the kidney slowly for 1.5 hours. Kidney is tough connective tissue; long, gentle simmering breaks it down into tenderness. A rapid boil toughens the meat and makes the stew chewy.
“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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