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 ↓
Macaroni with Tomatoes and Kidneys
Ingredients
Directions
Prepare the macaroni
Boil the macaroni in veal broth until tender.
Make the kidney gravy
Skin the mutton kidneys and fry them lightly in butter.
Remove the kidneys from the pan and mince them finely.
In the same pan, make a gravy by adding brown flour, rich gravy, minced shallots, and cayenne pepper.
Stew the minced kidneys in the gravy for 10 minutes.
Combine and serve
Mix part of the warm macaroni into the gravy and toss for a few minutes.
Serve the mixture on a hot dish, arranging the remaining macaroni on top.
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).
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Shallot + peppertop 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).
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Mutton + peppertop 16% of all pairsSmell alikelowCooked together5,442 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Mutton + buttertop 16% of all pairsSmell alikemoderateCooked together3,781 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
- Mutton kidneys
- Provide the main meat, giving the dish its characteristic rich, savoury flavour and firm texture.
- Macaroni
- Forms the starchy base, absorbing the gravy and adding bulk to the dish.
- Butter
- Fat for frying the kidneys, adding richness and light browning.
- Brown flour
- Thickens the gravy and adds colour and a toasted flavour.
- Rich gravy
- Supplies the liquid that moistens the kidneys and macaroni and carries the seasoning.
- Shallots
- Add a mild, sweet onion-like aroma to the gravy.
The step that matters
Frying the kidneys lightly. Kidneys turn tough and rubbery when overcooked, so they should be only lightly fried before mincing and finishing in the gravy, which keeps them tender.
Swap the shallot
How well each one fits the dish's main ingredients (mutton, butter, flour, pepper):
- Shallotthe original
- Leekfits about as well
- Potatofits about as well
- Turnipfits about as well
Fit is the average pairing score against mutton, butter, flour, pepper. 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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