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Beef Kidney

Sliced beef kidney fried and served with a sauce of butter, flour, boiling water, and mushroom ketchup or vinegar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 10 ingredients
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Beef Kidney

Why it works: Beef and mushroom are a kitchen classic. They rank in the top 4% of all ingredient pairs, and cooks put them together in 3,232 recipes. Both carry 2,4-nonadienal, which smells fatty, green. The science ↓

Beef Kidney

Ingredients

Directions

Prepare

  1. Trim and slice the kidney.

  2. Season with coarse sea salt and black pepper, then dredge in flour.

Fry and make the gravy

  1. Fry the slices on both sides until cooked through.

  2. Remove the kidney from the pan and empty it.

  3. In the same pan, melt the butter, then add 2 teaspoons of flour, salt, and pepper.

  4. Pour in 1 cup of boiling water and stir to combine.

  5. Simmer for 1 minute, then add mushroom ketchup, lemon juice, or vinegar to taste.

  6. Optionally, stir in minced herbs and finely shredded onion.

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.

Photo for illustrative purposes only · Contact us to use it

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. Beef + mushroomtop 4% of all pairs
    Smell alikemoderate
    Cooked together3,232 recipes

    Shared aroma: 2,4-nonadienal (fatty, green).

  2. Beef + oniontop 7% of all pairs
    Smell alikemoderate
    Cooked together17,092 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  3. Butter + mushroomtop 7% of all pairs
    Smell alikemoderate
    Cooked together12,525 recipes

    Shared aroma: trans-2-decenal (waxy, orange).

  4. Beef + peppertop 10% of all pairs
    Smell alikemoderate
    Cooked together18,971 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  5. Mushroom + oniontop 10% of all pairs
    Smell alikemoderate
    Cooked together10,626 recipes

    Shared aroma: 2,4-decadienal (seaweed).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Beef kidney
Is the main meat, cooked until tender and firm through frying.
Flour
Coats the slices to brown during frying and thickens the gravy.
Butter
Fat for frying the gravy base and carries flavour into the sauce.
Mushroom ketchup, lemon juice, or vinegar
Adds acidity that sharpens the rich, mineral flavour of the kidney.

The step that matters

Simmer the gravy after adding the flour and water. Flour needs to be cooked in fat and simmered in liquid so starch swells and the raw flour taste cooks off. Stopping early leaves the gravy thin or pasty-tasting.

Swap the onion

The recipe marks onion as optional. How well each one fits the dish's main ingredients (beef, pepper, flour, butter, mushroom):

  1. Shallotfits better
  2. Chivefits about as well
  3. Potatofits about as well
  4. Onionthe original

Fit is the average pairing score against beef, pepper, flour, butter, mushroom. 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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