Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Kidney Toasts
Ingredients
Directions
The book gives no oven temperature. The 400°F (200°C) in the steps was added when the recipe was transcribed, as a starting point.
Prepare the filling
Wash and pound the kidney with the surrounding fat.
Season with pepper, salt, lemon peel, and nutmeg. Mix in the beaten egg yolk.
Assemble and bake
Spread the mixture on thin slices of toasted bread cut into squares.
Grease a dish with butter and place the kidney toasts in it.
Brown the toasts in a 400°F (200°C) oven and 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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Pepper + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Lemon + nutmegtop 5% of all pairsSmell alikestrongCooked together11,318 recipes
Shared aroma: beta-phellandrene (minty, terpene).
-
Bread + buttertop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Pepper + nutmegtop 7% of all pairsSmell alikestrongCooked together13,015 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Egg + breadtop 13% of all pairsSmell alikemoderateCooked together22,662 recipes
Shared aroma: (e)-2-octenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Kidney
- Forms the main savoury filling, giving the toasts their body and rich flavour.
- Egg yolk
- Binds the pounded kidney mixture so it spreads evenly and holds its shape.
- Bread
- Provides a crisp base that holds the filling while it bakes.
- Lemon peel
- Adds bright aromatic oils that cut through the richness of the kidney.
The step that matters
Brown the toasts in the oven. Baking at high heat browns the surface and crisps the bread while the filling sets. Too low a heat or too long a bake can dry the filling and make the toast soggy or tough.
“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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