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Kidney Toasts

A toasted bread square topped with a seasoned kidney mixture and browned in the oven.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 ingredients
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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

  1. Pound the kidney and surrounding fat in a mortar.

  2. Season with pepper, salt, lemon peel, and nutmeg. Mix in the beaten egg yolk.

Assemble and bake

  1. Spread the mixture on thin toasted bread cut into squares.

  2. Melt butter in a dish and add the kidney toasts. Brown the toasts in a 400°F (200°C) oven.

  3. Serve very hot.

Recipe from a historical cookbook (Internet Archive).

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.

  1. Pepper + lemontop 3% of all pairs
    Smell alikestrong
    Cooked together27,047 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

  2. Lemon + nutmegtop 5% of all pairs
    Smell alikestrong
    Cooked together11,318 recipes

    Shared aroma: beta-phellandrene (minty, terpene).

  3. Bread + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together27,232 recipes

    Shared aroma: delta-decalactone (sweet, creamy).

  4. Pepper + nutmegtop 7% of all pairs
    Smell alikestrong
    Cooked together13,015 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

  5. Egg + breadtop 13% of all pairs
    Smell alikemoderate
    Cooked 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
Provides the rich, meaty base that gives the toasts their main flavor and body.
Egg yolk
Binds the pounded mixture so it spreads evenly and holds together on the bread.
Butter
Carries heat into the toasts and promotes golden browning in the oven.
Bread
Forms the crisp base that holds the spread and supports the filling.

The step that matters

Browning the toasts in the oven. Too little heat leaves the spread pale and the bread soggy, while too much can scorch the thin edges before the filling is hot. Watching the color closely helps the toasts brown evenly and stay crisp.

“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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