Why it works: Bread and butter are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 27,232 recipes. Both carry delta-decalactone, which smells sweet, creamy. The science ↓
Kidney Pie
Ingredients
Directions
The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare the kidneys
Cut the kidneys into neat squares and stew gently in weak stock for 30 minutes.
Cook the macaroni until tender, then cut it into 1-inch lengths.
Layer and bake
Butter a baking dish and layer in the macaroni.
Spread a layer of sliced kidneys over the macaroni, seasoned with pepper, salt, and made mustard.
Sprinkle a little flour over the kidneys and add a layer of sliced tomatoes.
Repeat the layers and cover with fine bread crumbs.
Pour in the rich gravy made from the stock used for stewing the kidneys.
Dot the top with small bits of butter and bake at 350°F (175°C) for 1 hour.
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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Bread + buttertop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Pepper + tomatotop 7% of all pairsSmell alikemoderateCooked together17,923 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Pepper + mustardtop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Tomato + breadtop 10% of all pairsSmell alikemoderateCooked together1,013 recipes
Shared aroma: 2-nonenal (fatty, green).
-
Mustard + tomatotop 11% of all pairsSmell alikemoderateCooked together2,482 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Kidneys
- Form the meaty main body of the pie, becoming tender when gently stewed.
- Macaroni
- Adds bulk and a soft, starchy layer that holds the pie together.
- Tomatoes
- Contribute moisture and a slight acidity that brightens the rich kidney layers.
- Rich gravy from stock
- Supplies moisture and savoury flavour that keeps the layers from drying out while baking.
- Fine bread crumbs
- Form a crisp, browned topping as the pie bakes.
- Butter
- Adds fat that enriches flavour and encourages browning on the top.
The step that matters
Stewing the kidneys gently. Kidneys turn tough and rubbery if boiled or cooked too hard. A gentle simmer for the stated time keeps the meat tender before it is baked a second time.
Swap the mustard
How well each one fits the dish's main ingredients (pepper, flour, tomato, bread, butter):
- Capsicumfits better
- Eggplantfits better
- Okrafits better
- Mustardthe original
Fit is the average pairing score against pepper, flour, tomato, bread, butter. 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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