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Cooking a Loin of Mutton En Papillote

A roasted mutton loin cooked with onions, carrot, herbs, and spices in parchment paper.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 ingredients
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Why it works: Carrot and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 8,053 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓

Cooking a Loin of Mutton En Papillote

Ingredients

Directions

Prepare

  1. Trim the loin of mutton nicely.

  2. Marinate the loin in salad oil, vinegar, onions, carrot, peppercorns, salt, parsley, and dried herbs from morning until roasting time.

  3. Turn the joint several times during the day and baste it often.

Roast

  1. Pack the marinated joint and vegetables in well-oiled paper, tying it securely with tape.

  2. Tie it to the spit and roast it carefully.

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. Carrot + parsleytop 1% of all pairs
    Smell alikestrong
    Cooked together8,053 recipes

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

  2. Onion + carrottop 6% of all pairs
    Smell alikemoderate
    Cooked together21,601 recipes

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

  3. Onion + parsleytop 9% of all pairs
    Smell alikemoderate
    Cooked together25,843 recipes

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

  4. Vinegar + oniontop 14% of all pairs
    Smell alikemoderate
    Cooked together18,226 recipes

    Shared aroma: acetic acid (sour, vinegar).

  5. Vinegar + parsleytop 16% of all pairs
    Smell alikemoderate
    Cooked together6,477 recipes

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

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

What each ingredient does

Mutton loin
Forms the main body of the dish, becoming tender and juicy as it roasts.
Salad oil
Carries the herbs and seasoning into the meat and helps keep the surface moist.
Vinegar
Adds acidity to the marinade, which helps tenderise the surface of the meat.
Onions
Release sweetness and aroma into the marinade as they soften.

The step that matters

Tie it to the spit and roast it carefully. The paper packet traps steam and juices, so the meat cooks gently in its own moisture. Heat that is too high can scorch the paper or dry the joint, so steady, careful heat matters.

Swap the onion

How well each one fits the dish's main ingredients (mutton, vinegar, carrot, parsley):

  1. Turnipfits better
  2. Shallotfits better
  3. Parsnipfits better
  4. Onionthe original

Fit is the average pairing score against mutton, vinegar, carrot, parsley. 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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