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A Scotch Haggis

A dish made by stuffing a sheep's stomach with liver, heart, lungs, suet, oatmeal, onions, pepper, and salt, then boiling.

From an old cookbook · modernised transcription
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Why it works: Pepper and onion are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

A Scotch Haggis

Ingredients

Directions

Prepare the stomach

  1. Wash the sheep's stomach with cold water and turn it inside out.

  2. Scald the stomach quickly and scrape the stomach.

  3. Soak the stomach in cold salt water until needed.

Prepare the filling

  1. Parboil the liver, lungs, and heart.

  2. Grate the liver.

  3. Mince the lungs and heart finely.

  4. Mince the suet.

  5. Toast the oatmeal before the fire.

  6. Mix all ingredients together.

  7. Season the mixture with pepper and salt.

Stuff and boil

  1. Fill the stomach bag with the mixture.

  2. Add a little water used to boil onions for flavor before sewing the bag shut.

  3. Sew the bag shut.

  4. Place the bag in a pan with boiling water to cover it and a small plate underneath.

  5. Prick the bag with a needle to prevent bursting.

  6. Boil for 4-5 hours, keeping it covered with boiling water.

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 + oniontop 11% of all pairs
    Smell alikemoderate
    Cooked together68,474 recipes

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

  2. Liver + oniontop 15% of all pairs
    Smell alikelow
    Cooked together1,420 recipes

    Shared aroma: furaneol (caramel, strawberry).

  3. Liver + peppertop 21% of all pairs
    Smell alikemoderate
    Cooked together2,375 recipes

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

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

What each ingredient does

Sheep's stomach
Forms the casing that holds the filling together while it cooks.
Oatmeal
Provides the bulk and dry, crumbly texture of the filling.
Suet
Adds fat that keeps the filling moist and rich as it cooks.
Liver
Contributes savoury depth and a soft, grated body to the filling.
Heart
Adds meaty substance and chew to the minced filling.
Onions
Flavour is added through the onion water poured into the bag.

The step that matters

Prick the bag before boiling. Steam forms inside the filling as it cooks and can burst the casing if it cannot escape, so the bag is pricked with a needle first.

Swap the onion

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

  1. Capsicumfits better
  2. Carrotfits better
  3. Mustardfits about as well
  4. Onionthe original

Fit is the average pairing score against liver, pepper. 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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