Why it works: Lemon and pepper 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 Toast
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 kidneys
Stew the kidneys in a little stock or water until tender.
Remove the skin and gristle, then pound the kidneys until smooth.
Mix in the butter, lemon juice, cayenne, salt, and black pepper.
Pass the mixture through a wire sieve.
Assemble and bake
Spread the mixture lightly on the prepared toast.
Heat in a 400°F (200°C) oven until thoroughly hot, then serve.
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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Lemon + peppertop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Butter + lemontop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Butter + peppertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Kidneys
- Provide the main body and rich flavour of the spread.
- Butter or good fat
- Adds richness and a smooth, spreadable texture.
- Lemon juice
- Adds a touch of acidity that brightens the rich kidney flavour.
The step that matters
Pass the mixture through a wire sieve. Pounding alone leaves fibres and small bits of gristle, which make the spread grainy. Pressing it through a sieve gives the smooth texture the dish depends on.
“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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