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Kidney Ragout

A stew of beef kidneys simmered with tomatoes, onions, cayenne pepper, and parsley, served over boiled rice.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Pepper and parsley match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓

Kidney Ragout

Ingredients

Directions

Prepare

  1. Cut the kidneys into ½-inch pieces and coat them with flour.

  2. Heat lard in a pan and cook the kidneys until browned.

Make the ragout

  1. Stew the scalded tomatoes in their own liquid for 30 minutes.

  2. Add the browned kidneys to the tomatoes along with the chopped onion, cayenne pepper, and parsley.

  3. Simmer the ragout over low heat for 2 hours, adding hot water if it becomes too thick.

Serve

  1. Serve hot with boiled rice.

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 + parsleytop 2% of all pairs
    Smell alikestrong
    Cooked together34,122 recipes

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

  2. Tomato + ricetop 6% of all pairs
    Smell alikestrong
    Cooked together3,065 recipes

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

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

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

  4. Tomato + peppertop 7% of all pairs
    Smell alikemoderate
    Cooked together17,923 recipes

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

  5. Beef + tomatotop 8% of all pairs
    Smell alikemoderate
    Cooked together5,448 recipes

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

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

What each ingredient does

Beef kidneys
Provide the main meat, which browns on the outside while staying tender inside.
Flour
Coats the kidney pieces, helping them brown and thickening the sauce slightly.
Tomatoes
Form the liquid base of the ragout, adding moisture, acidity, and body.
Onions
Add savory sweetness and aroma as they soften in the sauce.

The step that matters

Simmering the ragout slowly. Kidneys become tough if cooked too hard or too fast. Low, gentle simmering over two hours breaks down connective tissue gradually, keeping the meat tender while the sauce thickens.

Swap the onion

How well each one fits the dish's main ingredients (beef, flour, tomato, pepper, parsley, rice):

  1. Carrotfits better
  2. Okrafits better
  3. Capsicumfits better
  4. Onionthe original

Fit is the average pairing score against beef, flour, tomato, pepper, parsley, rice. 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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