Mushroom and Barley Soup

Featured in: Vegetarian Picks

This satisfying soup combines earthy cremini mushrooms with nutty pearl barley for a deeply comforting bowl. The vegetables are sautéed to develop depth before simmering with dried thyme and oregano. Ready in just over an hour, this European-style soup thickens naturally as the barley cooks, creating a rich, nourishing texture.

The flavors deepen overnight, making it excellent for meal prep. Add diced potatoes or kale in the final minutes for extra heartiness, or enhance the umami with a splash of soy sauce.

Updated on Wed, 21 Jan 2026 14:04:00 GMT
A steaming bowl of Mushroom and Barley Soup, with tender sliced mushrooms and chewy pearl barley swimming in a rich, golden vegetable broth. Pin
A steaming bowl of Mushroom and Barley Soup, with tender sliced mushrooms and chewy pearl barley swimming in a rich, golden vegetable broth. | garlicgroove.com

My tiny apartment kitchen smelled like a forest after rainfall the first time I made this soup. The mushrooms sizzled in the olive oil, releasing that deep earthy aroma that somehow makes everything feel cozy and right. I'd grabbed a bundle of fresh thyme from the farmers market on impulse, not knowing yet how perfectly it would weave through the barley. That evening, spooning steaming bowls while rain tapped against the window, I understood why this combination has been feeding people through cold winters for generations.

Last winter, my friend Sarah dropped by unexpectedly after a terrible day at work. I hadn't planned on company, but this soup was simmering on the stove. We sat at my kitchen table in silence for the first few minutes, just the sound of spoons clinking against bowls. Then she looked up and said, I think I can face tomorrow now. That's the magic of really good comfort food.

Ingredients

  • Olive oil: A couple tablespoons creates the foundation for all those vegetables to soften and mingle
  • Onion: Finely chopped so it nearly melts into the broth, providing that sweet base note
  • Garlic: Two cloves minced right before adding keeps its punch intact
  • Carrots and celery: The classic duo that builds depth, diced small so they cook evenly
  • Mushrooms: Four hundred grams of cremini or button mushrooms, sliced not too thin so they keep some substance
  • Dried thyme and oregano: These Mediterranean herbs bring warmth and complexity that blooms during simmering
  • Pearl barley: About two thirds of a cup gives the soup its signature heartiness and creates that gorgeous texture
  • Vegetable broth: Six cups of good quality broth makes up the soul of this soup
  • Bay leaf: One single leaf adds subtle herbal notes in the background
  • Salt and pepper: Essential for pulling all flavors together at the end
  • Fresh parsley: A couple tablespoons chopped brightens everything with fresh color and flavor
  • Lemon juice: Just a tablespoon wakes up all the earthy flavors if you want that extra brightness

Instructions

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Build your flavor foundation:
Warm the olive oil in a large pot over medium heat, then add the onion and let it cook for about 3 minutes until it turns translucent and fragrant.
Add the aromatic vegetables:
Stir in the garlic, carrots, and celery, cooking for another 5 minutes and stirring occasionally until they start to soften and smell wonderful.
Develop the mushrooms:
Add the sliced mushrooms and cook for 6 to 8 minutes, watching them release their moisture and start to turn golden brown in spots.
Wake up the herbs:
Sprinkle in the dried thyme and oregano, stirring constantly for about 30 seconds until their aromas fill the air.
Bring it all together:
Pour in the rinsed barley, vegetable broth, and bay leaf, stirring everything together so the grains are submerged.
Let it simmer into magic:
Bring to a boil, then reduce heat to low and let it simmer uncovered for 35 to 40 minutes until the barley is tender and the soup has thickened beautifully.
Finish with finesse:
Fish out the bay leaf, then season with salt and pepper, adding the lemon juice if you want that bright pop.
Serve it warm:
Ladle into bowls and scatter fresh parsley on top like confetti.
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A rustic wooden table holds a ladle of Mushroom and Barley Soup garnished with fresh parsley, perfect for a cozy vegetarian dinner. Pin
A rustic wooden table holds a ladle of Mushroom and Barley Soup garnished with fresh parsley, perfect for a cozy vegetarian dinner. | garlicgroove.com

This soup became my go to meal prep recipe during a particularly busy month. Every Sunday I'd make a double batch, and having those containers in the fridge felt like giving my future self a warm hug. The barley keeps its chewy texture perfectly, making lunch something to actually look forward to.

Choosing Your Mushrooms

Cremini mushrooms offer the best balance of flavor and texture for this soup. Button mushrooms work perfectly fine and are usually more budget friendly. If you want something special, shiitakes add incredible umami depth but can be pricier.

Making It Your Own

This soup welcomes variations like an old friend. Diced potatoes or chopped kale can go in during the last 15 minutes of cooking for extra substance. A splash of soy sauce with the broth creates a deeper, richer flavor profile.

Serving Suggestions

Crusty bread for dunking is practically mandatory. A light green salad with lemon vinaigrette balances the hearty soup perfectly. For a complete meal, serve alongside a simple grilled cheese sandwich.

  • Keep some extra broth on hand if you prefer a thinner soup
  • The barley absorbs liquid as it sits, so you may need to add more when reheating
  • This soup freezes beautifully for up to three months
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Close-up view of a hearty Mushroom and Barley Soup, showcasing diced carrots and celery in a thick, savory broth, ready to serve. Pin
Close-up view of a hearty Mushroom and Barley Soup, showcasing diced carrots and celery in a thick, savory broth, ready to serve. | garlicgroove.com

There's something profoundly satisfying about watching barley plump up in simmering broth, transforming from hard little pearls into tender grains. This soup is proof that simple ingredients, treated with care, become something extraordinary.

Recipe Questions

Is pearl barley gluten-free?

No, pearl barley contains gluten. If you need a gluten-free alternative, consider using quinoa or rice instead, and ensure your vegetable broth is certified gluten-free.

Can I make this soup ahead of time?

Absolutely. This soup actually tastes better the next day as flavors have time to meld. Store in an airtight container in the refrigerator for up to 4 days. The barley will continue absorbing liquid, so you may need to add more broth when reheating.

Can I freeze this soup?

Yes, freeze for up to 3 months. Note that the barley will soften more upon freezing and thawing. For best results, slightly undercook the barley if planning to freeze, and add fresh herbs and lemon juice after reheating.

What type of mushrooms work best?

Cremini or button mushrooms are ideal for their earthy flavor and meaty texture. For more depth, try adding shiitake or porcini mushrooms. Dried porcini soaked in the broth can add incredible umami richness.

How do I know when the barley is done?

Pearl barley typically takes 35-40 minutes to become tender. Taste a few grains—they should be chewy but not crunchy or gritty. The soup will also thicken noticeably as the barley releases its starch.

Can I use quick-cooking barley instead?

Yes, but reduce the simmering time to 10-15 minutes and add it later in the cooking process. Quick barley may result in a thinner soup since it doesn't release as much starch as pearl barley.

Mushroom and Barley Soup

Earthy, comforting soup featuring tender mushrooms and chewy pearl barley, perfect for warming up on chilly days.

Prep duration
15 min
Cook duration
45 min
Complete duration
60 min


Complexity Easy

Heritage European

Output 4 Portions

Dietary requirements Vegetarian, No dairy

Components

Vegetables

01 2 tablespoons olive oil
02 1 medium onion, finely chopped
03 2 cloves garlic, minced
04 2 medium carrots, diced
05 2 celery stalks, diced
06 14 oz mushrooms, sliced (cremini or button recommended)
07 1 teaspoon dried thyme
08 1 teaspoon dried oregano

Grains & Liquids

01 2/3 cup pearl barley, rinsed
02 6 cups vegetable broth
03 1 bay leaf

Seasoning & Garnish

01 Salt and freshly ground black pepper, to taste
02 2 tablespoons fresh parsley, chopped (optional)
03 1 tablespoon lemon juice (optional, for brightness)

Directions

Step 01

Sauté Onions: Heat the olive oil in a large pot over medium heat. Add the onion and cook for 3 minutes until translucent.

Step 02

Cook Aromatics: Stir in the garlic, carrots, and celery. Cook for 5 minutes, stirring occasionally, until vegetables begin to soften.

Step 03

Brown Mushrooms: Add the mushrooms and cook for 6-8 minutes, until they release their moisture and begin to brown.

Step 04

Add Herbs: Sprinkle in the thyme and oregano, stirring to coat the vegetables.

Step 05

Combine Ingredients: Add the rinsed pearl barley, vegetable broth, and bay leaf. Stir to combine.

Step 06

Simmer Soup: Bring to a boil, then reduce heat to low and simmer uncovered for 35-40 minutes, or until barley is tender and soup has thickened slightly.

Step 07

Season and Serve: Remove bay leaf. Season to taste with salt, pepper, and lemon juice if using. Ladle into bowls and garnish with fresh parsley.

Necessary tools

  • Large soup pot
  • Chopping board
  • Sharp knife
  • Wooden spoon
  • Ladle

Allergy details

Review each ingredient for potential allergens and speak with a healthcare provider if you're uncertain about anything.
  • Pearl barley contains gluten. Always check that your vegetable broth is gluten-free if required.

Nutrition breakdown (per portion)

These values are provided as estimates only and shouldn't replace professional medical guidance.
  • Energy: 210
  • Fat: 6 g
  • Carbohydrates: 36 g
  • Protein: 6 g