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 the kidney
Wash the kidney well and cut it into thin slices.
Roll the slices in flour, salt, and pepper.
Brown and stew
Brown the kidney quickly in butter over medium heat.
Transfer the kidney to a stewpan, add stock and sauces, and simmer slowly for 1.5 hours.
Mix rice flour with a little cold stock or water, then add 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.
-
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).
-
Rice + mushroomtop 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).
-
Rice + peppertop 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
- Provides the main meat, which becomes tender through slow simmering.
- Flour
- Coats the slices so they brown, and thickens the stock into a gravy.
- Rice flour
- Added at the end to thicken the stew further without making it cloudy.
- Butter
- Carries heat for quick browning and adds richness to the sauce.
- Mushroom ketchup
- Adds savoury depth and umami to the stewed gravy.
The step that matters
Simmer slowly for 1.5 hours. Kidney is tough muscle meat, and a long, gentle simmer breaks down its connective tissue. Boiling hard instead toughens the proteins and leaves it 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.
More stewed kidneys recipes
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Rice Fritters84 recipes
Mushroom Soup60 recipes
Steamed Rice48 recipes
Rice Griddle Cakes28 recipes