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Stewed Kidneys

A stew of kidneys cooked with butter, pepper, salt, flour, and hot water.

From an old cookbook · modernised transcription
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Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Stewed Kidneys

Ingredients

Directions

Prepare the kidneys

  1. Cut the kidneys in half and remove the core.

  2. Place the kidneys in a saucepan without water over medium heat until hot, but do not boil.

  3. After 30 minutes, wash the kidneys in cold water and return them to the saucepan with enough water to cover them.

  4. Boil for one hour, then remove and trim off the fat and skin.

Make the sauce and simmer

  1. In a frying pan, melt some butter, then add pepper, coarse sea salt, and a little flour.

  2. Pour in 2 cups of hot water and add the kidneys.

  3. Let them simmer for 20 minutes, stirring often to prevent drying out.

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. Butter + flourtop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Pepper + flourtop 19% of all pairs
    Smell alikemoderate
    Cooked together50,459 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Butter + peppertop 21% of all pairs
    Smell alikemoderate
    Cooked together85,593 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

Kidneys
Provide the main meat; gentle, moist cooking keeps their texture tender rather than tough.
Butter
Adds richness and fat to the pan, carrying flavor into the sauce.
Flour
Thickens the cooking liquid into a smoother, more cohesive sauce as it heats.

The step that matters

Keep the kidneys below a boil at the start. High heat makes proteins contract and toughen, so kidneys heated gently to just hot stay more tender than those brought to a rolling boil.

“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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