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Mushroom barley soup served in a white bowl on a wooden table

Mushroom Barley Soup (Easy!)

This hearty mushroom barley soup is simple to make with just 10 wholesome ingredients! It combines chewy barley, tender mushrooms, vegetables, and herbs in a rich, savory broth.
Author: Kaitlin - The Garden Grazer
Prep Time:30 minutes
Cook Time:30 minutes
Total Time:1 hour
Course: Main Dish, Soup
Cuisine: Oil-Free, Vegan
Servings: 4 large bowls

Ingredients

  • 8 oz. mushrooms (or more)
  • 1 yellow onion
  • 1 medium carrots
  • 2 stalks celery
  • 4 cloves garlic
  • 2 tsp. Italian seasoning
  • 1/2 cup pearl barley*
  • 6 cups vegetable broth
  • 2 tsp. apple cider vinegar
  • 2 Tbsp. fresh parsley
  • Salt and pepper to taste

Instructions

  • Prepare the veggies: Clean and slice the mushrooms. Set aside. Then dice the onion, carrot, and celery.
  • In a large stockpot over medium-high heat, sauté onion, carrot, and celery for 7-8 minutes. (I use about 3 Tbsp. water for no-oil sauté method, adding more as needed.)
  • Meanwhile, mince garlic.
  • When onion is translucent, add sliced mushrooms, garlic, and Italian seasoning. Stir and sauté 3-4 minutes.
  • Add vegetable broth. Increase heat and bring to a light boil.
  • Meanwhile, rinse barley. When the soup is lightly boiling, add barley. Stir and reduce heat to medium-low. Then cover and simmer for about 30 minutes or until barley is desired tenderness. (You can simmer it longer for a softer texture.)
  • Stir in the apple cider vinegar and fresh parsley (chopped) during the last couple minutes of cooking. Then salt & pepper to taste. (The barley tends to fall to the bottom of the pot, so dig deep when you're ladling it out!)

Notes

*Barley: I use pearl barley (also called pearled barley) which has a shorter cooking time. If you're using hulled barley, that requires a much longer cook time. So check your package instructions and adjust the simmering time as needed.
Thickness: For a thicker soup, increase the barley to about 2/3 cup. You can also increase the mushrooms to 12-16 ounces.
Mushrooms: Most of the time I use cremini, but you can swap in white button, Portobello, shiitake, etc.
Gluten-free version: Omit the barley and use white rice, brown rice, or even quinoa instead.
Recipe originally published October 2013. Updated August 2025.

Nutrition Per Serving (Estimate)

Calories: 144 kcal | Carbohydrates: 32 g | Protein: 5 g | Fat: 1 g | Saturated Fat: 0.1 g | Polyunsaturated Fat: 0.3 g | Monounsaturated Fat: 0.1 g | Potassium: 382 mg | Fiber: 6 g | Sugar: 6 g | Vitamin A: 3499 IU | Vitamin C: 8 mg | Calcium: 45 mg | Iron: 2 mg
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