Creamy Mushroom Barley Soup (Vegan)

Name: Creamy Mushroom Barley Soup (Vegan)
Prep time: 20 min
Cook time: 45 min
Total time: 1 h 5 min
Yield: 4 servings
Cuisine: Polish
Ingredients: 8 cups (1900 ml) vegetable broth; ¾ cup (150 g) pearl barley, rinsed; 1¼ pounds (570 g) mixed mushrooms (cremini, oyster, shiitake), sliced ¼-inch thick; 3 tablespoons (45 ml) extra-virgin olive oil; 1 whole (200 g) yellow onion, large, finely diced; 4 cloves (20 g) garlic cloves, minced; 2 medium (200 g) carrots, cut into ¼-inch dice; 2 stalks (120 g) celery stalks, cut into ¼-inch dice; 3 tablespoons (10 g) fresh dill, chopped, finely chopped (divided: 2 tbsp for cooking, 1 tbsp for garnish); 3 tablespoons (27 g) nutritional yeast; 2 whole bay leaves; to taste freshly ground black pepper; to taste sea salt; 2 tablespoons (30 ml) fresh lemon juice (optional)

From the MyKitchenBank Kitchen

A silky, comforting Polish-style soup built on umami-rich mushrooms and pearl barley, thickened with blended barley and enriched with nutritional yeast for savory depth. This vegan version captures the soul-warming quality of traditional mushroom barley while staying plant-based and entirely stovetop-friendly.

Prep: 20 min
Cook: 45 min
Total: 1 hr 5 min
Makes: 4 servings (about 10 cups total)

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Ingredients

4 servings

8 cups (1900 ml) vegetable broth
¾ cup (150 g) pearl barley, rinsed
1¼ pounds (570 g) mixed mushrooms (cremini, oyster, shiitake), sliced ¼-inch thick
3 tablespoons (45 ml) extra-virgin olive oil
1 whole (200 g) yellow onion, large, finely diced
4 cloves (20 g) garlic cloves, minced
2 medium (200 g) carrots, cut into ¼-inch dice
2 stalks (120 g) celery stalks, cut into ¼-inch dice
3 tablespoons (10 g) fresh dill, chopped, finely chopped (divided: 2 tbsp for cooking, 1 tbsp for garnish)
3 tablespoons (27 g) nutritional yeast
2 whole bay leaves
to taste freshly ground black pepper
to taste sea salt
2 tablespoons (30 ml) fresh lemon juice (optional)

Equipment (5)

Large heavy-bottomed pot or Dutch oven (5-quart minimum)
Chef's knife and cutting board
Immersion blender (or regular blender in batches)
Wooden spoon or silicone spatula
Measuring cups and spoons

Steps

Before you start

Have all vegetables prepped before you start cooking—mushrooms are best sliced just before use to prevent darkening.
Use vegetable broth at room temperature or slightly warm; very cold broth slows the cooking process.
If you prefer a thicker soup, reserve ¾ cup cooked barley mixture before blending to stir back in at the end.

1
Sauté the base vegetables
- Heat the olive oil in a large pot (5-quart) over medium heat until shimmering, about 1 minute.
- Add the diced onion and cook for 4–5 minutes, stirring occasionally, until softened and translucent.
- Stir in the minced garlic and cook for another 30 seconds until fragrant.
- Add the diced carrot and celery, stirring well, and cook for another 3 minutes to soften slightly.
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Ready when: Onion is translucent and carrot shows no resistance when pierced with a fork
Tip: Don't rush the initial softening of the aromatics—it builds the flavor foundation of the entire soup.
2
Build umami with mushrooms
- Increase the heat to medium-high.
- Add the sliced mushrooms in two batches, stirring after each addition, and cook for 8–10 minutes total.
- The mushrooms will release their liquid and then begin to brown and concentrate.
- You should see the bottom of the pot develop golden-brown bits (fond).
- Stir frequently to ensure even browning.
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Ready when: Mushrooms are deeply browned and liquid has mostly evaporated; fond coats the bottom of the pot
Tip: Don't stir too often in the first few minutes—allow the mushrooms to develop color by sitting still on the hot pot bottom.
3
Add barley and broth
- Reduce heat to medium.
- Pour in the 8 cups (1900 ml) of vegetable broth, scraping the bottom and sides of the pot with a wooden spoon to release all the browned fond.
- Add the rinsed pearl barley, bay leaves, and 2 tablespoons of the chopped fresh dill.
- Stir well to combine.
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Ready when: All ingredients are well submerged and mixed
Tip: Scraping the fond transfers all those caramelized flavors into the broth, deepening the final soup's taste.
4
Simmer until barley is tender
- Bring the soup to a gentle boil, then reduce heat to medium-low.
- Simmer uncovered for 25–30 minutes, stirring occasionally, until the pearl barley is tender but still has a slight bite (not mushy).
- The liquid should reduce by about one-quarter.
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Ready when: Pearl barley is tender and yields easily to a spoon; broth is slightly reduced and cloudy
Tip: Taste a few barley grains after 20 minutes to gauge doneness—they should be creamy inside, not hard or gritty.
5
Blend to create creaminess
- Remove the pot from heat and remove the bay leaves.
- Using an immersion blender, blend approximately half the soup (roughly 5 cups), working in pulses until smooth and creamy.
- Leave the remaining half unblended for texture contrast.
- If you don't have an immersion blender, carefully transfer half the soup to a regular blender, blend in batches, and stir back into the pot.
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Ready when: Blended portion is smooth and creamy; visible barley grains and mushroom pieces remain in the unblended half
Tip: Blending only half keeps the soup from becoming baby food while still creating the signature creamy, velvety texture that makes mushroom barley soup so comforting.
6
Stir in umami richness
- Place the pot back over medium-low heat.
- Stir in the 3 tablespoons of nutritional yeast, mixing constantly for 1–2 minutes to fully dissolve and incorporate.
- The soup will become even richer and slightly darker in color.
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Ready when: Nutritional yeast is fully dissolved; no visible specks remain and the broth is uniformly rich and creamy
Tip: Stir constantly to avoid clumping—nutritional yeast dissolves better when whisked into the warm liquid steadily.
7
Taste and season
- Taste the soup carefully.
- Add sea salt and freshly ground black pepper to your liking.
- If you have fresh lemon juice on hand, a squeeze (1–2 tablespoons) brightens the earthy mushroom flavors and balances the richness.
- Stir well and adjust seasoning as needed.
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Ready when: Soup is seasoned to your taste; flavors are balanced and bright
Tip: Taste after each addition—it's much easier to add salt or lemon than to remove it once overdone.
8
Serve and garnish
- Ladle the soup into bowls.
- Garnish each serving with the reserved 1 tablespoon of fresh chopped dill.
- A drizzle of quality olive oil and a crack of black pepper add final polish.
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Tip: Serve while still steaming; the warm bowl and soup temperature enhance the dill's aroma and the overall comfort-food experience.

Good to know

Tips

The key to depth is browning the mushrooms and scraping the fond from the pot—don't skip this step. It transforms the soup from bland to restaurant-quality.
Nutritional yeast adds B vitamins and a savory umami punch, but if you don't have it, use miso paste (1 tablespoon) stirred in instead for similar savory depth.
Partial blending is essential: it creates creaminess without pureeing away the rustic, hearty texture that makes this soup satisfying.
This soup reheats beautifully and tastes even better the next day as flavors meld and deepen. Make a double batch and freeze half.

Make ahead

Prepare all vegetables (onion, garlic, carrot, celery, mushrooms) up to 8 hours ahead and store in airtight containers in the refrigerator. The soup itself is best made fresh, but can be made up to 1 day ahead, cooled, and reheated gently on the stovetop before serving. Reblend partially if texture seems too thick after storage.

Storage & reheating

Room temperature: up to 2 hours. Refrigerator: up to 4 days in an airtight container. Freezer: up to 3 months in a freezer-safe container (thaw overnight in the fridge before reheating). To reheat: gently warm on the stovetop over medium-low heat, stirring occasionally and adding a splash of broth or water if the soup has thickened too much.

Substitutions

pearl barley → farro or spelt berries. Use the same weight; barley takes 25–30 minutes while farro and spelt may take 35–40 minutes. Taste for doneness at the longer end.
mixed mushrooms (cremini, oyster, shiitake) → cremini or button mushrooms exclusively (about 1.5 lbs / 680 g). You'll lose some earthiness but gain a milder, cleaner mushroom flavor. Brown them well to develop umami depth.
nutritional yeast → cashew cream (¼ cup / 60 ml raw cashews blended with ½ cup / 120 ml hot water). Blend until smooth, then stir into the soup after blending. This adds richness and creaminess instead of nutritional yeast's savory notes.
fresh dill, chopped → fresh parsley or thyme. Use the same amount. Parsley is mild and bright; thyme is earthier and woodsy. Both pair beautifully with mushroom.