Scotch Broth Soup

A traditional Scottish broth with real substance, Scotch broth sits somewhere between soup and stew: lamb gently simmered with pearl barley, split peas and sturdy winter vegetables until the liquid becomes savoury, thick and deeply comforting. Bone-in lamb neck gives the broth body, while carrots, swede, leek and onion add sweetness and texture without making the dish heavy. The grains and pulses soften as they cook, naturally thickening the pot, and a final handful of parsley keeps the finish fresh. It is the kind of practical, filling soup that suits cold-weather lunches, simple suppers or make-ahead batches, especially as the flavour develops well after resting.
Cuisine style Scottish comfort food
Cooking style One-pot cooking • Make-ahead friendly • Freezer-friendly
Time commitment Slow-cooked

Why this recipe works

  • Deep savoury base: Bone-in lamb, bay leaves and peppercorns create a rich broth before the vegetables and grains are added.
  • Hearty texture: Barley, split peas, lamb and root vegetables give the soup enough body to feel substantial without needing cream or flour.
  • Good for later: The soup keeps well and naturally thickens as it stands, making it practical for reheating or freezing.

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Authenticity notes

  • Slow simmered: A gentle simmer is central to the dish, helping the lamb become tender while keeping the broth clear and rounded.
  • Root vegetable base: Carrot, swede, leek and onion give the soup its familiar earthy sweetness and everyday Scottish comfort-food character.

Texture tips

  • For a thicker broth: Lightly mash some of the barley and split peas against the side of the pot, then stir them back through.
  • If it becomes too thick: Loosen the soup with a little water during simmering or reheating, adding it gradually until the texture is right.
  • Keep the lamb tender: Avoid a hard boil; steady, gentle heat gives the meat time to soften without becoming tight.

Ingredient notes

  • Use bone-in lamb: Lamb neck gives the broth body and savoury depth as it cooks, while still yielding meat to shred back into the soup.
  • Rinse the grains and pulses: Rinsing the barley and split peas removes excess starch and any dust before they go into the pot.
  • Wash the leek well: Leeks can hold grit between their layers, so slice and rinse thoroughly before adding them.

Make-ahead tips

  • Expect it to thicken: The barley and split peas continue absorbing liquid in the fridge, so the soup will be thicker the next day.
  • Reheat gently: Add a little water if needed and bring the soup back to a simmer until piping hot throughout.
  • Freezes well: Cool quickly, freeze in sealed containers, then defrost overnight in the fridge before reheating.

Equipment you'll need

Ingredients
Instructions
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  1. Put the lamb neck into a stockpot with the water, bay leaves, peppercorns and 1 tsp of the fine sea salt. Bring to the boil, then reduce to a gentle simmer and skim off any foam. Cover and simmer for 60 minutes, until the lamb is starting to feel tender.
  2. Meanwhile, rinse the pearled barley and split peas in a colander under cold water until the water runs clearer. Peel and dice the onion, then trim and slice the leek, washing well to remove any grit. Peel and dice the carrots and swede into small, even pieces so they cook at the same rate.
  3. Stir the barley and split peas into the pot, then add the onion, leek, carrots and swede. Return to a gentle simmer, partially cover, and cook for 45 minutes, stirring occasionally, until the grains are tender and the broth is thick. If it looks too thick, add a splash of water and keep simmering.
  4. Lift out the lamb neck and set it on a board until cool enough to handle. Pull the meat from the bones, discarding any large pieces of fat, then shred or chop it into bite-sized pieces. Return the meat to the pot and discard the bay leaves.
  5. Simmer for 5 minutes to warm the lamb through, then taste and season with the remaining 1 tsp fine sea salt if needed. Finely chop the parsley and stir most of it through the soup. Ladle into bowls and sprinkle over the remaining parsley to serve.

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Recipe notes

Tips

  • Keep the simmer gentle; a hard boil can make the lamb tough and turn the broth cloudy.
  • For a thicker, more traditional texture, lightly mash a few spoonfuls of the barley and peas against the side of the pot, then stir back in.
  • If serving vulnerable groups, ensure the soup is reheated until piping hot throughout.

Substitutions

  • Replace lamb neck with lamb shoulder for a meatier broth; keep the simmer gentle and skim well.
  • Replace split peas with red lentils for a softer, quicker-thickening soup.
  • Replace fresh parsley with fresh thyme for a more earthy finish.

Storage

  • Refrigerate up to 3 days
  • Cool quickly, then refrigerate in a sealed container. The soup will thicken as it stands; loosen with a little water when reheating and bring to a simmer until piping hot. Freeze for up to 3 months and defrost overnight in the fridge before reheating.

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Recipe overview

  • Servings: 4 servings
  • Total time: 2h (25min active)
  • Difficulty: Medium
  • Cuisine: British
  • Allergens:
    Gluten
One pot Freezer friendly Kid friendly

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