Easy Mushroom Barley Soup | Hearty and Delicious

Ingredients & Substitutions

• Olive Oil – Just your normal cooking oil is perfect here!
• Mirepoix & Garlic – Mirepoix (pronounced “meer-PWA”) is also known as the “French trinity.” It consists of onion, celery, and carrot, a potent trio of aromatics. Start any pot of soup by sautéing these and you’re well on your way to excellence! Adding garlic just builds more flavor. 
• Potato – I personally prefer using wax potatoes in soup, as they hold their shape better than starchy ones. Yukon Gold is the gold standard, but any thin-skinned potatoes will do the trick!
• White Button Mushrooms – These little guys are easy to find just about anywhere. Despite not tasting like much raw, they develop a lovely umami flavor after cooking.
• Dried Porcini Mushrooms – Dried porcini mushrooms have an unmistakably rich, earthy flavor with deep umami notes and a hint of nuttiness. When rehydrated, they add a savory, almost meaty depth to soups and stews. Make sure to keep and use the soaking liquid for the full effect!
• Pearl Barley – Pearl barley is a chewy, nutty grain that’s been polished to remove its outer husk and bran layer, allowing it to cook up tender and creamy. It absorbs the flavors of soups and stews beautifully while adding a hearty, satisfying texture to each bite.
• Ground Cumin & Black Pepper – Two of my favorite warming spices! Make sure to use freshly cracked black pepper for the most potent flavor. 
• Thyme & Parsley – Fresh herbs add a nice bit of brightness to an otherwise umami-heavy pot. Plus, throwing some on top as garnish makes your bowl even prettier!
• Water/Stock & Salt – Starting with stock will give your mushroom barley soup more depth, but it’ll still be savory and delicious even if you just use water. 

This is just a short review of the ingredients; for the complete recipe, including quantities, scroll down to the recipe card 👇

All About Barley

Barley is an ancient grain that’s been cultivated for thousands of years and is prized for its nutty flavor, chewy texture, and nutritional benefits. It’s a member of the grass family and one of the world’s oldest cultivated crops, used for everything from soups and stews to bread, beer, and even tea.

Nutritionally, barley is a whole grain rich in fiber, vitamins, and minerals, especially beta-glucan, a soluble fiber known to support heart health and steady blood sugar levels. When cooked, barley becomes plump and tender yet retains a pleasant bite, making it a perfect ingredient for hearty soups like this one.

There are several types of barley you’ll see in recipes:

• Pearl Barley – The most common variety for soups and stews. It’s polished to remove the outer husk and bran layers, which shortens the cooking time and gives it a tender, creamy texture.
• Hulled Barley – A less processed form that retains more nutrients and a slightly chewy texture. It takes significantly longer to cook but offers a deeper, nuttier flavor.
• Quick-Cooking Barley – Pre-steamed and dried for convenience. It cooks in about 10-15 minutes, making it perfect for weeknight meals.
• Barley Flakes or Flour – Made from rolled or ground barley, often used in baking or as a breakfast cereal alternative to oats.

In mushroom barley soup, pearl barley is the star. It releases just enough starch as it cooks to create a naturally thick, velvety broth. Its hearty chew pairs perfectly with earthy mushrooms, making each spoonful warm, rustic, and deeply satisfying. That said, if you’re in a rush, swap in quick-cooking barley instead!

How to Make Mushroom and Barley Soup

Watch the full video recipe to learn how to make the BEST Barley and Mushroom Soup recipe.

Prefer the written recipe? Scroll down to the recipe box 👇

Optional Variations & Dietary Adaptations

Mushroom barley soup is wonderfully flexible, so you can easily adapt it to your tastes or dietary needs. Here are a few ideas to get you started:

• Add Meat – For a heartier meal, stir in shredded rotisserie chicken, browned ground beef, or diced beef stew meat. Bacon or pancetta also add smoky depth.
• Gluten-Free Swap – Since barley contains gluten, replace it with a hearty grain like brown rice, quinoa, or buckwheat groats. Cook times may vary slightly, but the result will be just as satisfying.
• Add More Vegetables – Load up on carrots, celery, kale, spinach, or even diced sweet potatoes for extra nutrition and texture. It’s a great way to clean out the crisper drawer at the end of the week!
• Make It Creamy – Stir in a splash of cream, half-and-half, or coconut milk at the end for a rich, velvety finish.

Expert Tips & Tricks 

• Rinse the barley first. Give your barley a quick rinse under cold water before cooking to remove any excess starch or dust. This keeps your soup from becoming overly thick or cloudy.
• Sauté for flavor. Take the time to sauté your mirepoix, garlic, and particularly the mushrooms before adding broth. This caramelization step builds a deeper, richer flavor base.
• Rehydrate dried mushrooms properly. Soak dried porcini in hot water for 15-20 minutes, then strain and reserve the soaking liquid. Adding that liquid to your soup boosts the umami flavor.
• Mind the barley’s cooking time. Barley continues to absorb liquid as it sits, so if you’re making the soup ahead, consider cooking it slightly al dente and adding more broth before reheating.
• Season in layers. Add salt gradually throughout the cooking process to help each ingredient shine. This looks like adding a big pinch when sautéing the aromatics, adding another pinch to sweat the mushrooms, and another when you add the barley and broth.
• Deglaze the pot. After sautéing the aromatics, pour in a splash of white wine, sherry, or broth and scrape up the browned bits at the bottom of the pot for even more depth.
• Finish with freshness. Just before serving, add a squeeze of lemon juice or a sprinkle of fresh herbs like parsley or thyme to brighten the earthy flavors.
• Think ahead. This soup also tastes even better the next day, so it’s perfect for meal prep or make-ahead lunches.

How to Serve Mushroom Barley Soup

This vegan mushroom barley soup is hearty enough to shine as a meal on its own, but it also plays well with traditional soup sides and garnishes. A sprinkle of fresh parsley, thyme, a drizzle of good olive oil or grated Parmesan just before serving adds a burst of color and freshness. Or, go Eastern European and add a dollop of sour cream or crème fraîche on top for a creamy finish.

Serve it with a slice of crusty sourdough or garlic parmesan dinner rolls; you’ll want to sop up every drop. A side green salad also makes a classic pairing. For a more filling dinner, pair your bowl with a grilled cheese sandwich, roasted vegetables, or even a side of creamy mashed potatoes for extra comfort.

Storage & Reheating

• Refrigeration – Let the soup cool completely, then transfer it to an airtight container. Store in the refrigerator for up to 4-5 days. The barley will continue to absorb liquid as it sits, so you may need to stir in a splash of broth or water before reheating.
• Freezing – This soup freezes beautifully! Portion it into freezer-safe containers or bags, leaving a bit of room at the top for expansion. Freeze for up to 3 months. Thaw overnight in the refrigerator before reheating.
• Reheating – Warm the soup gently on the stove over medium heat, stirring occasionally until hot. If the texture seems too thick, add more broth or water until you reach your desired consistency. You can also reheat individual portions in the microwave, stirring halfway through to ensure even heating.

FAQs