Lentil and White Bean Soup with Kale

This Lentil & White Bean Soup is healthy, hearty, and full of flavor, making it the perfect one-pot meal for busy nights. It’s packed with plant-based protein, fiber, and colorful veggies to keep you feeling satisfied and energized. With simple ingredients and cozy spices, this soup makes healthy eating feel easy and comforting. 

Why You’ll Love It

There are a few reasons this Lentil & White Bean Soup will become a staple in your weekly rotation:

• High in fiber and protein: This recipe gives you 22 grams of plant-based protein and a whopping 23 grams of fiber from the lentils, white beans and vegetables, helping to support digestion, blood sugar stability, and fullness.

• Nutrient-Dense: This soup packs in a ton of beneficial nutrients that can help boost your energy levels and fight inflammation such as folate, iron, potassium, vitamin A, and vitamin C.

• Easy to make: Everything comes together in one pot with minimal prep, making it perfect for weeknights or meal prep Sundays.

• Budget-friendly: Made with pantry staples like lentils, canned beans, and diced tomatoes, this soup is affordable without sacrificing nutrition or flavor.

• Freezer-friendly: It freezes beautifully for up to 3 months, so you can always have a nourishing meal on hand.

• PCOS-friendly: With a balance of fiber, protein, and anti-inflammatory ingredients, this soup supports hormone health, blood sugar regulation, and steady energy throughout the day.

Ingredients

While this soup requires a handful of ingredients, they all work together in harmony to bring a hearty, filling soup with a robust flavor.

• Olive oil: the base for sautéing your veggies and building flavor, olive oil adds healthy fats to the soup.

• Onion and garlic: these aromatics create a flavorful foundation. Freshly diced onion and minced garlic cloves bring depth and warmth- plus, garlic offers anti-inflammatory benefits.

• Carrots and celery: classic soup veggies that add sweetness, crunch, and plenty of vitamins. Dice them evenly so they cook at the same rate.

• Dried lentils: a great source of plant-based protein and fiber. Brown lentils or green lentils work best here since they hold their shape while cooking. No soaking required, just rinse them well before adding.

• White beans (cannellini or great northern): white beans have a mild flavor and add texture. Using canned beans makes this recipe quick and easy. You can easily use different beans, such as kidney beans or pinto beans.

• Diced tomatoes: add acidity and brightness that balances the earthiness of the lentils and beans. No need to drain, use the juices for extra flavor!

• Vegetable broth: use low-sodium broth so you can control the salt level. It creates the savory base that ties all the ingredients together.

• Dried thyme, smoked paprika, and cumin: a mix of herbs and spices that bring warmth, depth, and a subtle smokiness. 

• Salt and black pepper: season to taste to balance and enhance all the flavors.

• Kale: adds a boost of color, fiber, and antioxidants. Stir it in at the end so it stays bright and tender. You can easily substitute fresh spinach instead of kale.

• Lemon juice: a squeeze of lemon at the end lifts and brightens the flavor of the soup. Fresh lemon juice works best, but bottled works too if that’s what you have.

How to Make It

I provided two separate sets of directions, depending if you’re planning to use a large pot or a slow cooker to make this lentil and white bean soup recipe.

One Pot Instructions

Step One: Sauté The Veggies.

In a large pot, heat olive oil over medium heat. Add the diced onion, minced garlic, carrots, and celery. Cook for 5–7 minutes, stirring occasionally, until the vegetables are softened and fragrant.

Step Two: Add The Lentils And Seasoning.

Stir in the rinsed lentils, diced tomatoes (with their juices), vegetable broth, thyme, smoked paprika, cumin, salt, and pepper. Bring everything to a boil, then reduce the heat to low and let it simmer.

Step Three: Simmer Until Tender.

Cover and cook for 25–30 minutes, stirring occasionally, until the lentils are tender and the soup has thickened slightly.

Step Four: Add The White Beans And Greens.

Stir in the drained white beans and chopped kale or spinach. Simmer for another 5 minutes, until the greens are wilted and the beans are heated through.

Step Five: Finish With Lemon Juice.

Stir in the lemon juice to brighten the flavors. Taste and adjust the salt and pepper as needed before serving.

Slow Cooker Instructions

Step One: Prep The Veggies.

In a skillet, heat olive oil over medium heat. Sauté the onion, garlic, carrots, and celery for 3–5 minutes until slightly softened. (You can skip this step if you’re short on time, the soup will still turn out delicious.)

Step Two: Add Ingredients To The Slow Cooker.

Transfer the sautéed veggies to the slow cooker. Add the lentils, diced tomatoes (with their juices), vegetable broth, thyme, smoked paprika, cumin, salt, and pepper.

Step Three: Cook Until Tender.

Cover and cook on low for 6–7 hours or on high for 3–4 hours, until the lentils are tender and the soup has thickened.

Step Four: Add The White Beans And Greens.

Stir in the white beans and kale or spinach. Cover and cook for another 15–20 minutes, until the greens are wilted and the beans are warmed through.

Step Five: Finish With Lemon Juice.

Right before serving, stir in the lemon juice to brighten the flavor. Adjust salt and pepper to taste, and serve warm.

Tips, Variations, + Substitutions

• Need it gluten-free? You’re in luck, this recipe is naturally gluten-free as long as you use certified GF broth and canned beans!
• Want it extra hearty? Stir in cooked quinoa, brown rice, or small pasta for a more filling meal.
• Prefer a smoother texture? Use an immersion blender to lightly blend part of the soup before adding the greens and white beans. This gives it a thicker, creamier base.
• Add more veggies by tossing in diced zucchini, bell peppers, or sweet potatoes; they’ll add color and extra nutrients.
• For more flavor depth, try adding a dash of soy sauce, balsamic vinegar, bay leaves, or a sprinkle of chili powder or red pepper flakes for a little heat.
• Meal prepping for the week? This soup stores and reheats beautifully, so make a big batch and portion it into containers for grab-and-go lunches or dinners.
• Bump up the protein by adding in your favorite meat, such as chicken or turkey. 

How to Store It

Store any leftover soup in an airtight container in the fridge for up to 4–5 days. The flavors get even better as it sits, making it perfect for meal prep.

To freeze, let the soup cool completely before transferring it into freezer-safe containers or souper cubes for easy portioning. Once frozen, transfer to a labeled freezer bag or airtight container. It will keep well for up to 2–3 months.

When you’re ready to enjoy your leftover lentil soup, thaw overnight in the fridge or reheat gently on the stove the next day. Add a splash of broth or water if needed to loosen the texture as it warms.

How to Serve It

This classic soup recipe is hearty enough to stand on its own, but it’s also easy to dress up or pair with sides to make it even more satisfying:

• As a main dish: Enjoy a warm bowl of lentil soup on its own for a balanced, plant-based meal packed with protein and fiber.

• With crusty bread or crackers: Serve with crusty whole grain bread, garlic toast, or your favorite crackers for dipping.

• Over grains: Pour over cooked quinoa, farro, or rice for an even heartier, nutrient-dense meal.

• Topped with herbs or cheese: Add a sprinkle of fresh parsley, basil, or thyme before serving. For extra richness, try a dusting of parmesan or nutritional yeast.

• With a salad: Pair with a simple green salad or roasted veggie side to round out the meal.

Other Easy Recipes You’ll Love

• Easy Baked Feta Pasta With Chicken
• High Protein Mac and Cheese Recipe
• Chicken Orzo Bake
• Easy Mediterranean Bean Pasta Salad

If you make this Lentil & White Bean Soup, please consider leaving a star rating and review at the end of this blog post. This is incredibly helpful to me and it helps other readers to know what to expect!