Slow Cooker Chicken Barley and Vegetable Soup

Name: Slow Cooker Chicken Barley and Vegetable Soup
Prep time: 15 min
Total time: 15 min
Yield: 6 servings
Cuisine: American
Ingredients: 2 lbs (900 g) boneless, skinless chicken thighs, patted dry; ¾ cup (150 g) pearl barley, rinsed; 8 cups (1920 ml) low-sodium chicken broth; 3 whole (450 g) large carrots, peeled and cut into ½-inch rounds; 3 whole (225 g) celery stalks, trimmed and cut into ½-inch pieces; 1 whole (225 g) large yellow onion, peeled and diced into ½-inch pieces; 3 whole (15 g) garlic cloves, minced; 2 whole fresh or dried bay leaves; 4 sprigs (5 g) fresh thyme sprigs; to taste black pepper, freshly ground; to taste kosher salt; 3 tablespoons (10 g) fresh flat-leaf parsley, chopped, for garnish (optional)

From the MyKitchenBank Kitchen

A comforting Scottish-inspired soup built on tender chicken thighs, pearl barley, and classic aromatic vegetables simmered together in a slow cooker. The barley softens and thickens the broth while absorbing deep flavors. This one-pot meal is perfect for busy days—just add everything in the morning and dinner is ready when you come home.

Prep: 15 min
Cook: —
Wait: 8 hr
Total: 8 hr 15 min
Makes: 6 servings (about 9 cups total)

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Steps

Before you start

Pat the chicken thighs dry with paper towels so they brown properly if searing (optional but recommended for deeper flavor)
Trim any excess fat from the chicken if desired
Have your slow cooker ready and plug it in before assembling ingredients

1
Prepare vegetables
- Peel and slice the carrots into ½-inch thick rounds.
- Trim the celery and cut it into ½-inch pieces, discarding the leafy tops.
- Peel the onion, cut it in half, and dice it into ½-inch pieces.
- Mince the garlic.
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Ready when: All vegetables are evenly cut to roughly the same size
Tip: Uniform vegetable sizes help them cook evenly in the slow cooker. Work on a dry cutting board so pieces don't slip.
2
Assemble in slow cooker
- Add the patted-dry chicken thighs to the bottom of a 6-quart slow cooker.
- Layer the carrots, celery, and onion over the chicken.
- Sprinkle the minced garlic over the vegetables.
- Add the rinsed pearl barley, then pour in the chicken broth.
- Nestle the bay leaves and thyme sprigs into the liquid.
- Season generously with kosher salt and freshly ground black pepper (about ½ teaspoon salt and ¼ teaspoon pepper to start, as you'll adjust at the end).
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Ready when: All ingredients are submerged in broth
Tip: Don't overfill the slow cooker—the liquid should not come higher than 2 inches from the rim. If it does, remove some broth.
3
Cook on low
- Cover the slow cooker with its lid and set it to LOW.
- Cook for 8 hours.
- The soup should simmer gently throughout, with occasional small bubbles breaking the surface around the edges.
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Ready when: Chicken thighs easily shred with a fork, barley is tender and plump, carrots break apart with light pressure
Tip: Avoid lifting the lid during cooking—every time you do, heat escapes and adds 15–20 minutes to the cooking time. If you must check, do it after 7 hours.
4
Shred the chicken
- Turn off the slow cooker.
- Remove the bay leaves and thyme sprigs with tongs or a spoon and discard.
- Using two forks or a slotted spoon, pull the cooked chicken thighs apart into bite-sized shreds directly in the pot, breaking them into 1- to 2-inch pieces.
- Stir gently to distribute the shredded chicken throughout the soup.
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Ready when: Chicken falls into small, tender pieces
Tip: The chicken will be very soft and may stick to the fork slightly—this is normal for long-cooked thighs. Shredding while still warm makes the task easier.
5
Taste and season
- Ladle a small spoonful of broth into a separate bowl to cool slightly, then taste it.
- Add more kosher salt and black pepper as needed.
- Remember that the broth should taste slightly salty on its own, as the flavors will be more muted once served in a full bowl.
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Ready when: Broth tastes well-seasoned, with no flat or underseasoned flavor
Tip: Always taste soup while it's warm and after cooling slightly—seasoning perception changes with temperature.
6
Serve
- Ladle the soup into bowls.
- If desired, garnish each bowl with a small sprig of fresh parsley or additional chopped thyme.
- Serve hot.
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Tip: For a heartier bowl, serve with crusty bread or oatcakes on the side to soak up the broth.

Good to know

Tips

For extra depth of flavor, optionally brown the chicken thighs in a large skillet over medium-high heat for 2–3 minutes per side before adding them to the slow cooker. This develops a golden crust and adds richness, though it's not essential for a great result.
If your household prefers a thicker soup, mash some of the cooked vegetables or barley against the side of the slow cooker with the back of a spoon, or blend a cup of soup and stir it back in after shredding the chicken.
Pearl barley absorbs liquid as it cooks; if your soup is thinner than you'd like, leave the lid off and let it cook on LOW for another 15–30 minutes after shredding the chicken to allow some liquid to evaporate.
This soup is forgiving: if you have parsnips, mushrooms, or peas on hand, add them in the final 1–2 hours of cooking. Hearty greens like kale or spinach can be stirred in just before serving (they'll wilt in the hot broth).

Make ahead

Assemble the slow cooker insert up to 12 hours ahead. Cover and refrigerate it overnight, then set it in the slow cooker base in the morning and cook as directed. Add an extra 30–45 minutes to the cooking time since the ingredients start cold. Alternatively, prepare and cook the soup fully, then cool and refrigerate it; reheat gently on the stovetop over low heat or in the slow cooker on LOW for 1–2 hours.

Storage & reheating

Store leftovers in an airtight container in the refrigerator for up to 4 days. The soup thickens as it cools due to the barley; thin it with additional broth when reheating if desired. Freeze in 2-cup portions in freezer containers or zip-top bags for up to 3 months. Thaw overnight in the refrigerator and reheat gently on the stovetop over medium-low heat, stirring occasionally, for 15–20 minutes until warmed through.

Substitutions

pearl barley → farro or brown rice (use the same amount; both will soften in about the same time, though brown rice may remain slightly firmer). Barley is traditional and contributes a mild, slightly nutty flavor; farro adds a chewier texture, while rice makes the soup creamier.
boneless, skinless chicken thighs → bone-in, skin-on chicken thighs or chicken drumsticks (use 2.5 lbs / 1.1 kg to account for bone weight; remove skin and bones at step 4). Bone-in thighs yield more flavorful broth but require a bit more work to shred. Boneless thighs are quicker and easier.
fresh thyme sprigs → 2 teaspoons dried thyme or ½ teaspoon ground thyme. Fresh thyme provides a brighter, more delicate herbal note. Dried thyme is more concentrated, so use less.
low-sodium chicken broth → bone broth (homemade or store-bought) or vegetable broth for a lighter option. Bone broth deepens the soup's savory flavor; vegetable broth keeps it mild and suitable for lighter appetites.