Why it works: Flour and shallot match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 2,081 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Ox Kidneys
Ingredients
Directions
Prepare the kidney
Slice the ox kidney into pieces about the size of a half crown and double the thickness, avoiding the tough white part.
Melt the butter in a stewpan over medium heat until hot but not black.
Make the stew
Add the kidney pieces and stir with a wooden spoon for 3 minutes over a brisk fire.
For each pound of kidney, add 2 tablespoons of flour, ½ teaspoon of salt, ¼ teaspoon of pepper, and 1 teaspoon of sugar.
Moisten with ½ cup of water and ⅓ cup of sherry, adding browning if available.
Let simmer gently for 5 minutes, stirring occasionally.
If the mixture is too thick, add a few drops more water.
The mixture should be thick enough to adhere to the back of a spoon.
Serve
Serve hot.
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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Flour + shallottop 6% of all pairsSmell alikestrongCooked together2,081 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Pepper + shallottop 11% of all pairsSmell alikemoderateCooked together5,898 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + sherrytop 14% of all pairsSmell alikemoderateCooked together3,505 recipes
Shared aroma: ethyl octanoate (fruity, wine).
-
Flour + sugartop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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
- Ox kidney
- Forms the main body of the stew, becoming tender with gentle simmering.
- Butter
- Fat that browns the kidney pieces and carries flavour through the stew.
- Flour
- Thickens the liquid so the stew clings to a spoon.
- Sherry
- Adds acidity and aroma that balance the rich kidney.
The step that matters
Stirring the kidney in the hot butter. If the butter is too hot and turns black, it will taste bitter and scorch the kidney. Medium heat until hot, not dark, gives browning without burning.
Swap the shallot
The recipe marks shallot as optional. How well each one fits the dish's main ingredients (butter, flour, pepper, sugar, sherry):
- Capsicumfits better
- Arrowrootfits about as well
- Shallotthe original
- Leekfits about as well
Fit is the average pairing score against butter, flour, pepper, sugar, sherry. 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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