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Spanish Onion Sauce

A braised onion sauce with beef, cayenne pepper, salt, lemon juice, sugar, and culis.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 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 ↓

Spanish Onion Sauce

Ingredients

Directions

  1. Braise the onions with the beef until three parts done.

  2. Peel the onions and add culis.

  3. Season with Cayenne pepper, salt, lemon juice, and sugar.

  4. Stew until the onions are tender.

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. Onion + beeftop 7% of all pairs
    Smell alikemoderate
    Cooked together17,092 recipes

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

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

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

  4. Onion + peppertop 11% of all pairs
    Smell alikemoderate
    Cooked together68,474 recipes

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

  5. Lemon + sugartop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

    Shared aroma: 2-nonenal (fatty, green).

Lemon and sugar barely smell alike, yet cooks put them together in 53,532 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

Spanish onions
Provide the main body and sweetness of the sauce as they soften and break down.
Beef
Adds savory meaty flavor to the onions during the braise.
Culis
Adds liquid and concentrated flavor, helping the onions stew to a saucy consistency.
Lump sugar
Adds sweetness that balances the sharpness of the lemon juice and cayenne.

The step that matters

Stew until the onions are tender. Onions must soften fully so their sugars and starches break down into a smooth sauce; stopping early leaves a coarse, sharp texture.

Swap the onion

How well each one fits the dish's main ingredients (beef, pepper, lemon, sugar):

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

Fit is the average pairing score against beef, pepper, lemon, sugar. 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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