Double Lentil Mushroom Barley Soup

Featured in: Weeknight Dinners

This wholesome soup combines red and brown lentils with pearl barley, cremini mushrooms, and tender collard greens in a flavorful vegetable broth. Smoked paprika and thyme add depth, while the simmering process allows all ingredients to meld into a satisfying, protein-packed bowl. Perfect for meal prep and even better the next day, this soup delivers nourishment and comfort in every spoonful.

Updated on Wed, 28 Jan 2026 16:54:00 GMT
A steaming bowl of Double Lentil and Mushroom Barley Soup garnished with fresh parsley. Save
A steaming bowl of Double Lentil and Mushroom Barley Soup garnished with fresh parsley. | opticbaker.com

I spent a rainy Tuesday trying to clear out my pantry and found two half empty bags of lentils and a stray jar of barley. The house smelled like damp wood and cold air so I needed something that felt like a thick blanket. This soup was born from that need for warmth and a desire to use what I had. It turned out much richer than I expected because the different lentils break down at different rates. Now it is my favorite way to celebrate a quiet afternoon at home.

Last winter a sudden power outage left us huddled in the kitchen with just the gas stove and a single candle. I stirred this pot by the flickering light while my daughter helped me wash the collard greens. We watched the mushrooms brown and listened to the rain drum against the windowpanes. By the time the soup was ready the cold house felt like a sanctuary. It was one of the most peaceful meals we ever shared in the dark.

Ingredients

  • Red lentils: These tiny pulses soften quickly and act as a natural thickener for the base of your soup.
  • Brown lentils: These hold their shape well and provide a nice bite alongside the softer grains.
  • Pearl barley: This grain adds a wonderful nutty flavor and a satisfying texture that makes the bowl feel substantial.
  • Cremini mushrooms: Slicing these thinly and letting them brown thoroughly ensures a deep umami flavor throughout the broth.
  • Collard greens: These hardy greens stand up well to the heat without turning to mush like more delicate leaves.
  • Smoked paprika: A small amount gives the liquid a subtle woodsy depth that mimics the flavor of a slow cooked ham bone.
  • Vegetable broth: Using a high quality stock ensures the lentils and barley absorb maximum flavor during their long simmer.

Instructions

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Softening the base:
Heat the oil in your heaviest pot and toss in the onions until they look glossy and smell sweet. This creates the foundational flavor for the entire recipe.
Building the aromatics:
Stir in the garlic carrots and celery to let them mingle with the onions for a few minutes. You will notice the kitchen starting to smell incredible as the vegetables soften.
Browning the mushrooms:
Add the sliced mushrooms and let them cook undisturbed for a moment so they develop a golden brown sear. This step is essential for getting that deep savory taste in every spoonful.
Simmering the grains:
Stir in the lentils barley and spices before pouring in the liquid and bringing everything to a gentle bubble. Cover the pot and let the heat work its magic on the grains for about half an hour.
Wilting the greens:
Toss in the chopped collard greens and season the pot with salt and pepper as the leaves turn tender. The greens will soften beautifully in the hot broth while keeping their vibrant green color.
The final check:
Take out the bay leaves and give the soup one last stir before serving it hot in big bowls. The consistency should be thick and hearty enough to stand a spoon in.
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Rustic Double Lentil and Mushroom Barley Soup served in a ceramic bowl with crusty bread. Save
Rustic Double Lentil and Mushroom Barley Soup served in a ceramic bowl with crusty bread. | opticbaker.com

I once brought a big thermos of this to a community garden workday in early March when the ground was still frozen. Everyone was chilled to the bone from digging in the cold damp soil and looking for warmth. We sat on upturned buckets and shared bowls while the steam rose into the crisp morning air. That was the moment I realized this recipe was meant for sharing with tired friends who need a boost.

Swapping Your Greens

Choosing the right green can change the whole personality of the pot depending on what you have. While collards are my favorite for their structure kale works just as well if you want a slightly more bitter edge. If you use Swiss chard remember to add it at the very last second because it wilts almost instantly in the heat.

Achieving the Perfect Broth

The liquid to grain ratio is the secret to keeping this from turning into a thick porridge over time. I always start with eight cups but keep a kettle of hot water nearby just in case. If the barley drinks up too much liquid I just pour in a little more to keep it perfectly spoonable.

The Finishing Touch

A soup this rich benefits from a little bit of brightness right before you take your first bite. I like to offer a few different options at the table so everyone can customize their own bowl. It makes the meal feel a bit more interactive and special for your guests.

  • Squeeze a fresh lemon wedge over the soup for a zesty lift.
  • Stir in a small spoonful of balsamic vinegar for a deep tangy note.
  • Add a pinch of red pepper flakes if you prefer a tiny bit of heat.
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Hearty Double Lentil and Mushroom Barley Soup in a ladle over the simmering pot. Save
Hearty Double Lentil and Mushroom Barley Soup in a ladle over the simmering pot. | opticbaker.com

I hope this bowl brings you as much peace and warmth as it has brought my family over the years. Enjoy every hearty spoonful of this nourishing meal.

Cooking Q&A

Can I make this soup gluten-free?

Yes, simply substitute the pearl barley with short-grain brown rice or quinoa. Both alternatives maintain the hearty texture while making it suitable for gluten-free diets. Always verify your vegetable broth is certified gluten-free as well.

How long does this soup keep in the refrigerator?

This soup stores beautifully for 4-5 days when kept in an airtight container in the refrigerator. The flavors continue to develop, making leftovers even more delicious. Reheat gently on the stovetop, adding a splash of water or broth if needed.

Can I freeze this soup?

Absolutely. Portion cooled soup into freezer-safe containers, leaving space for expansion. It freezes well for up to 3 months. Thaw overnight in the refrigerator before reheating. Note that barley may become slightly softer after freezing.

What can I substitute for collard greens?

Swiss chard, kale, or spinach work wonderfully as alternatives. Add delicate greens like spinach in the last 5 minutes of cooking to prevent wilting, while heartier greens like kale can be added along with the collards as the recipe indicates.

Do I need to soak the lentils before cooking?

No soaking required. Red and brown lentils cook relatively quickly and will become tender during the simmering process. Simply rinse them thoroughly before adding to the pot. This makes for a convenient, fuss-free preparation.

How can I add more protein to this soup?

This soup already provides 12g of protein per serving from the lentils and barley. To boost it further, consider adding a cup of white beans during the last 15 minutes of cooking, or serve with a side of crusty whole-grain bread topped with nut butter or hummus.

Double Lentil Mushroom Barley Soup

Hearty soup with red and brown lentils, mushrooms, barley, and collard greens for a protein-rich vegan meal.

Time to prepare
20 mins
Time to cook
45 mins
Overall time
65 mins
Recipe by Ella Anderson

Dish Type Weeknight Dinners

Skill Level Easy

Cuisine International

Makes 6 Portions

Dietary details Vegan-friendly, No Dairy

What You'll Need

Legumes & Grains

01 ½ cup red lentils, rinsed
02 ½ cup brown lentils, rinsed
03 ¾ cup pearl barley, rinsed

Vegetables

01 2 tablespoons olive oil
02 1 large yellow onion, diced
03 3 garlic cloves, minced
04 2 medium carrots, diced
05 2 celery stalks, diced
06 10 ounces cremini or button mushrooms, sliced
07 4 cups chopped collard greens

Liquids

01 8 cups vegetable broth
02 1 cup water

Herbs & Seasonings

01 1 teaspoon dried thyme
02 1 teaspoon smoked paprika
03 2 bay leaves
04 1 teaspoon salt, or to taste
05 ½ teaspoon black pepper, or to taste
06 2 tablespoons chopped fresh parsley, optional for garnish

How to Make It

Step 01

Sauté aromatics: Heat olive oil in a large soup pot over medium heat. Add diced onion and cook for 3 minutes until softened.

Step 02

Build flavor base: Stir in minced garlic, diced carrots, and diced celery. Continue cooking for 3 to 4 minutes.

Step 03

Cook mushrooms: Add sliced mushrooms and cook, stirring occasionally, until softened and browned, approximately 5 minutes.

Step 04

Combine legumes and grains: Stir in red lentils, brown lentils, pearl barley, dried thyme, smoked paprika, and bay leaves.

Step 05

Add liquid and bring to boil: Pour in vegetable broth and water. Bring to a boil over medium-high heat, then reduce heat to low for simmering.

Step 06

Simmer base: Cover and cook for 30 minutes, stirring occasionally, until lentils and barley begin to soften.

Step 07

Finish with greens: Add chopped collard greens, salt, and pepper. Simmer uncovered for 10 to 15 minutes until barley and lentils are tender.

Step 08

Adjust seasoning: Taste and adjust salt and pepper as needed. Remove bay leaves before serving.

Step 09

Serve: Ladle soup into bowls, garnish with fresh parsley if desired, and serve hot.

Tools You'll Need

  • Large soup pot
  • Chef's knife
  • Cutting board
  • Measuring cups and spoons
  • Ladle

Allergy details

Always review every ingredient for allergens and speak to your healthcare provider if you're unsure.
  • Contains gluten from barley
  • Nut-free, soy-free, and dairy-free
  • For gluten-free diets, use certified gluten-free grain and verify broth labels

Nutrition details (per serving)

These nutrition details are for your reference—don't substitute for professional medical guidance.
  • Caloric Value: 245
  • Fat content: 4 g
  • Carbohydrates: 44 g
  • Proteins: 12 g