Scotch broth is a hearty Scottish soup built on lamb or beef, barley, and a mix of dried peas and lentils. The dried legumes in a typical Scotch broth mix need soaking before they can cook through evenly, and getting that soak right is the difference between a creamy, tender soup and one with hard, gritty bits. This guide explains exactly how long to soak your Scotch broth mix, with a full recipe that puts the soaked mix to work in a classic, warming broth.
Ingredients
- 1½ cups (300 g) Scotch broth mix (dried split peas, yellow peas, green split peas, red lentils, and pearl barley)
- 8 cups (1.9 L) cold water, for soaking
- 2 tbsp (30 ml) vegetable oil
- 1 large onion, finely chopped (about 1 cup / 150 g)
- 2 medium carrots, peeled and diced (about 1 cup / 130 g)
- 1 large leek, white and light green parts, sliced (about 1 cup / 100 g)
- 1 celery stalk, diced (about ½ cup / 60 g)
- 1 lb (450 g) boneless lamb shoulder or beef stew meat, cut into ¾-inch cubes
- 6 cups (1.4 L) low-sodium beef or chicken broth
- 1 bay leaf
- 1 tsp (5 g) salt, plus more to taste
- ½ tsp (1 g) freshly ground black pepper
- 2 tbsp (30 g) chopped fresh parsley, for garnish
Instructions
- Soak the Scotch broth mix: Place the mix in a large bowl and cover with the 8 cups of cold water. Let it soak at room temperature for 8 to 12 hours (overnight is ideal). The peas will swell and soften, and the barley will plump. Drain and rinse the mix thoroughly before using.
- Brown the meat: Heat the oil in a large Dutch oven or heavy pot over medium-high heat. Add the lamb or beef and cook until browned on all sides, about 5 to 7 minutes. Remove the meat to a plate and set aside.
- Sauté the vegetables: In the same pot, add the onion, carrots, leek, and celery. Cook over medium heat, stirring occasionally, until the vegetables begin to soften, about 5 minutes.
- Add broth and meat: Return the browned meat to the pot. Pour in the broth, add the bay leaf, and bring to a boil.
- Add the soaked mix: Stir in the drained Scotch broth mix. Reduce the heat to low, cover, and simmer gently for 1 hour 30 minutes to 1 hour 45 minutes, or until the peas are tender and the barley is cooked through. Stir occasionally to prevent sticking.
- Season and finish: Remove the bay leaf. Stir in the salt and pepper. Taste and adjust seasoning. If the soup is too thick, add a little hot broth or water to reach your desired consistency.
- Serve: Ladle into bowls and garnish with chopped parsley.
Tips
- Soaking time matters: The mix needs at least 8 hours of soaking. If you’re short on time, you can do a “quick soak”: cover the mix with boiling water, let it sit for 1 hour, then drain and cook. The texture will be slightly less creamy, but it works.
- Don’t add salt to the soaking water: Salt can toughen the skins of the peas. Add salt only during the last 15 minutes of cooking.
- Rinse thoroughly: After soaking, drain and rinse the mix well to remove any dust or debris and to reduce the likelihood of gas.
- Substitute the meat: If you prefer a vegetarian version, skip the meat and use vegetable broth. Add the soaked mix with the vegetables and simmer for about 1 hour 15 minutes, or until tender.
Serving Suggestions
Serve this Scotch broth as a main course with crusty bread or oatcakes. It also pairs well with a simple green salad and a dollop of sour cream or Greek yogurt on top. For a traditional Scottish touch, serve with a slice of buttered bannock or a warm roll.
Variations
- Vegetable Scotch Broth: Omit the meat and use vegetable broth. Add extra root vegetables like turnips or parsnips.
- Smoky Scotch Broth: Add 4 oz (115 g) of diced smoked bacon or a ham hock along with the meat. This adds a deep, smoky flavor.
- Herb-Forward: Add a sprig of fresh thyme or rosemary along with the bay leaf. Remove before serving.
- Spicy Kick: Add a pinch of red pepper flakes or a diced chili pepper with the vegetables for a bit of heat.
Storage and Reheating
Refrigerate leftover Scotch broth in an airtight container for up to 4 days. The soup will thicken as it sits; add a splash of broth or water when reheating. Reheat on the stovetop over medium heat, stirring occasionally, until piping hot (165°F / 74°C). You can also freeze the soup for up to 3 months. Thaw overnight in the refrigerator before reheating.
Frequently Asked Questions
Can I soak Scotch broth mix for too long?
Yes. Soaking for more than 24 hours can cause the peas and barley to ferment slightly, leading to an off flavor and mushy texture. Stick to 8–12 hours for best results.
Do I really need to soak the mix, or can I cook it without soaking?
You can cook it without soaking, but you’ll need to increase the cooking time to about 2 to 2½ hours, and the peas may remain slightly hard in the center. Soaking ensures even, tender cooking.
Can I use the soaking water in the soup?
No. The soaking water contains oligosaccharides that can cause digestive discomfort. Always drain and rinse the mix after soaking.
What if I only have a few hours before cooking?
Use the quick soak method: cover the mix with boiling water and let it sit for 1 hour. Drain and rinse before adding to the soup. The texture will be slightly less creamy, but it will still be edible.
Can I freeze the uncooked soaked mix?
Yes. After soaking and draining, you can freeze the mix in a zip-top bag for up to 3 months. Thaw overnight in the refrigerator before using. You may need to add 15–20 minutes to the cooking time.
Why are the peas still hard after cooking?
This usually happens if the mix wasn’t soaked long enough or if the soup was cooked at too high a boil. Simmer gently and ensure the mix is fully submerged in liquid. Also, old dried peas may never soften completely.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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