Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Stewed Kidneys
Ingredients
Directions
Prepare and cook the kidneys
Slice the kidneys in half and remove the core.
Separate the kidneys and place them in a saucepan without water over medium heat until hot, but do not boil.
After 30 minutes, wash the kidneys in cold water and return them to the saucepan.
Add just enough water to cover the kidneys and boil for 1 hour.
Remove the kidneys, trim off the fat and skin.
Make the stew
In a frying pan, melt the butter, then add pepper, salt, and flour.
Pour in the hot water and add the kidneys.
Let them simmer for 20 minutes, stirring often to prevent drying out.
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 + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Pepper + flourtop 19% of all pairsSmell alikemoderateCooked together50,459 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + peppertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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
- Kidneys
- Provide the main meat, whose texture sets the character of the stew.
- Butter
- Adds richness and carries flavour, and browns lightly in the pan.
- Flour
- Thickens the cooking liquid into a stew-like sauce as it heats.
The step that matters
Simmer gently and stir often. Once the flour is in, the liquid thickens and can reduce, scorch or dry out at the bottom of the pan. Stirring and a gentle simmer keep the sauce smooth and the kidney pieces from toughening.
“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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