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Close-up of a rustic bowl of mushroom barley soup filled with tender mushrooms, pearl barley, and fresh herbs, served on a wooden table with a spoon and linen napkin beside it.

Mushroom Barley Protein Soup

Rustic, hearty, and rich with umami flavor, this Mushroom Barley Protein Soup is the ultimate comfort bowl. Earthy mushrooms, tender pearl barley, and fresh herbs simmer in a savory broth, delivering a nourishing, high-fiber, plant-protein-packed meal.
Servings 4 servings
Prep Time 10 minutes
Cook Time 40 minutes
Total Time 50 minutes

Equipment

  • Large soup pot
  • wooden spoon
  • chef's knife
  • cutting board
  • measuring cups and spoons

Ingredients

  • 1 tbsp olive oil or butter
  • 1 medium onion, diced
  • 2 carrots, diced
  • 2 celery stalks, chopped
  • 3 cloves garlic, minced
  • 12 oz mushrooms (cremini, shiitake, or mixed), sliced
  • ¾ cup pearl barley, rinsed
  • 6 cups vegetable or chicken broth
  • 1 tsp dried thyme (or 2 tsp fresh)
  • 1 bay leaf
  • Salt and pepper to taste
  • 1 tbsp soy sauce (optional, for umami)
  • 2 cups fresh spinach or kale (optional greens)
  • Fresh parsley for garnish

Instructions

  • Heat olive oil in a large pot over medium heat. Sauté onion, carrot, and celery for 5 minutes until softened.
  • Add mushrooms and garlic. Cook 8–10 minutes until mushrooms release liquid and become golden.
  • Stir in thyme, bay leaf, salt, pepper, and soy sauce if using.
  • Add rinsed barley and pour in broth. Bring to a boil.
  • Reduce heat, cover, and simmer 35–40 minutes until barley is tender, stirring occasionally.
  • In the last 5 minutes, add spinach or kale and stir until wilted.
  • Taste and adjust seasoning. Remove bay leaf and garnish with parsley before serving.

Notes

Let mushrooms brown before stirring, it deepens their flavor.
Barley thickens the broth as it cooks; add more liquid if needed.
Add lemon juice at the end for brightness.
To avoid over-thickening, store cooked barley separately if meal prepping.
This soup freezes well, portion into containers for grab-and-go meals.

Nutrition

Calories: 260kcalCarbohydrates: 39gProtein: 12gFat: 6gSaturated Fat: 1gPolyunsaturated Fat: 1gMonounsaturated Fat: 3gSodium: 430mgPotassium: 620mgFiber: 9gSugar: 6gVitamin A: 3800IUVitamin C: 8mgCalcium: 55mgIron: 3mg
Author: Jano Ferrel
Calories: 260kcal
Course: Soup
Cuisine: Comfort Food
Keyword: hearty soup, high fiber soup, mushroom barley soup, protein soup, vegetarian soup