Lentil Soup Recipe

We’re making hearty Lentil Soup in the Chili Pepper Madness kitchen today, my friends! It’s one of those toss-it-all-in-the-pot dinners I reach for when I want something filling but still on the lighter side.

My mom made lentil soup all the time when I was a kid (cheap, simple, great for a big family) but it was pretty light on seasoning and add-ins. These days I love lentil soup because I make it my way, with plenty of spice and satisfying flavor. Call it my "upgraded lentil soup".

The base is simple and pantry friendly, a few veggies, canned tomatoes, dried lentils, and just enough spice to wake everything up. No soaking needed. The lentils cook right in the pot until they’re tender, and you can blend a bit of the soup to make it extra creamy without any cream.

Like most Chili Pepper Madness recipes, you can keep this healthy lentil soup nice and mild or bring on some heat. I use jalapeño and chili powder, then finish my bowl with red pepper flakes, chili crisp, or hot sauce and plenty of extra lemon. It’s naturally vegetarian, easy to make vegan, great for meal prep, and perfect for chilly nights when you want big flavor that still feels good.

Lentil Soup Ingredients & Swaps

The full ingredients list with measurements is listed in the printable recipe card at the bottom of the post.

Here’s what you’ll need to make this lentil soup, plus a few notes and easy swaps.

• Olive Oil. For sautéing the veggies. Use any neutral cooking oil you like.
• Onion. A yellow or white onion is perfect for the savory base.
• Carrot. Adds natural sweetness, body, and nutrition.
• Bell pepper. I like the extra flavor and color it brings, like it does to Cajun dishes. Any color works.
• Jalapeño (optional). For a touch of heat. Skip to keep it mild. Use 2-3 or hotter chilies to up the heat factor.
• Garlic. Fresh garlic is best. I just LOVE lots of garlic.
• Dried Green or Brown Lentils. Best for this recipe. They cook up tender but still hold their shape without turning mushy. No soaking needed.
• Diced Tomatoes (Fire-Roasted Preferred). Fire-roasted tomatoes add extra flavor and a hint of smoky char, but regular diced tomatoes work just fine.
• Vegetable Broth + Water. Chicken broth also works if you’re not concerned about being vegetarian. Use water or more stock to adjust the soup thickness.
• Smoked Paprika. For subtle smoky flavor that builds. Regular is good, or try hot paprika for more kick!
• Ground Cumin. Earthy and classic with lentils and tomatoes.
• Chili Powder. Use ancho, guajillo, New Mexican, or a mild American blend to add chili flavor without overpowering heat. People love my homemade chili powder recipe.
• Dried Herbs. Oregano (or Italian seasoning), dried thyme, bay leaves. Pretty standard for classic lentil soup - for a reason. It's great with the subtle herby notes.
• Salt and Black Pepper. To taste.
• Fresh Spinach or Kale. I've tested many greens and these are my preferred for nutritional value, color, and texture. Kale is a bit heartier, but spinach cooks more quickly and softly. We usually grow both in our garden.
• Fresh Lemon Juice. A fresh pop of citrus always wakes up all the spices. Don’t skip it at the end.
• Fresh Parsley or Cilantro. Adds a nice color to the top and a bit of fresh flavor finish.

How to Make Lentil Soup

Heat the olive oil in a large pot or Dutch oven over medium heat. Add the onion, carrot, bell pepper, and jalapeño (if using). Cook 6-8 minutes, stirring now and then, until everything softens and the edges start to turn lightly golden.

Stir in the garlic, smoked paprika, cumin, chili powder, oregano (or Italian seasoning), thyme, and bay leaves. Cook about 30 seconds to 1 minute, just until the garlic is fragrant and the spices smell “toasty,” not raw.

Pour in the diced tomatoes (with their juices), the broth, and 1 cup of water. Add the lentils. Stir well, scraping up any flavorful bits from the bottom of the pot.

Bring everything to a gentle boil, then reduce to a steady simmer. Cover partially and cook 25-35 minutes, stirring occasionally, until the lentils are tender. If the soup thickens too much, add a splash of water or broth as needed.

Once the lentils start to soften, stir in the salt and black pepper. Taste and adjust. Lentil soup really comes alive with proper seasoning, and you may want a touch more salt depending on your broth.

Stir in the spinach or kale and cook 2-3 minutes until wilted and bright green. (Kale may take a couple minutes longer, so chop it smaller if you want it softer.)

Turn off the heat and stir in the lemon juice. Add the parsley or cilantro for a fresh flavor boost.

Remove the bay leaves. Taste again and adjust - more lemon for bright acidity, more salt, more water/broth to thin, or a pinch of chili powder for extra heat.

For a creamier soup without cream, blend a couple cups of the soup (or hit it with an immersion blender for a few quick pulses), then stir it back in. You’ll get a thicker soup while keeping plenty of whole lentils and veggies.

Boom! Done! Your lentil soup is ready to serve!

What to Serve with Lentil Soup

Lentil soup is a full meal in a bowl, but a good side can really nail the meal. Here are some of my favorites:

• Mike's Way. Drizzle on my homemade chili crisp, a few splashes of my homemade habanero hot sauce, and a few sprinkles of chili flakes. Yum.
• A little hot sauce bar. Set out a few of your favorite hot sauces or chili oils and let everyone customize the heat level in their bowl, CPM-style.
• Crusty bread or rolls. Any good warmed crusty loaf is perfect for dipping. Garlic bread? Yum!
• Roasted vegetables. Add a side of honey roasted carrots, honey sriracha brussels sprouts, or roasted sweet potatoes to round out the meal.
• Cornbread or savory muffins. Slightly sweet skillet cornbread, spicy jalapeno cornbread, or savory cornbread muffins are perfect pairings.

Variations

You can keep this as a classic lentil soup or switch it up a bit depending on your mood and what you have on hand.

• Extra Veggie Lentil Soup. Add more chopped veggies with the onion and carrot, like zucchini, extra bell pepper, celery, roasted chilies, or even a handful of mushrooms. Stir in extra spinach or kale at the end if you love a greener bowl.
• Smoky Sausage Lentil Soup. Brown 8-12 ounces of sliced smoked sausage like andouille, conecuh, or kielbasa in the pot first, then remove it to a plate. Cook the veggies in the rendered fat plus a bit of oil, then add the sausage back in with the lentils and liquids. Or cook ground beef or Mexican chorizo when you cook the early veggies.
• Mexican-Style Lentil Soup. For a Mexican twist, try Lentejas (or Sopa de Lentejas) with potato and spicy chorizo.

Storage, Freezing & Reheating

How Long Does Lentil Soup Last in the Fridge? Let the soup cool to room temperature, then transfer it to airtight containers and refrigerate. It will keep well for 3-4 days. The flavors actually deepen as it rests, so it’s great for make-ahead lunches and dinners.

Can I Freeze Lentil Soup? Yes! This lentil soup freezes very well.

• Spoon it into freezer-safe containers or zip-top bags (leave a little room for expansion).
• Label and freeze for up to 3 months.
• For easy portions, freeze in smaller containers or flat in bags, then stack.

To use, thaw overnight in the refrigerator or gently in a bowl of cold water.

How to Reheat Lentil Soup. Lentil soup thickens as it sits, especially after chilling or freezing, so plan to add a bit of liquid back.

• Stovetop: Add the soup to a pot with a splash of water or broth. Warm over medium-low heat, stirring now and then, until heated through. Add more liquid as needed to reach your desired consistency.
• Microwave: Transfer to a microwave-safe bowl, add a splash of water or broth, and cover loosely. Heat in 45-60 second bursts, stirring between each, until hot.

Taste after reheating and finish with a fresh squeeze of lemon, a pinch of salt, and a little extra parsley or cilantro if you have it.

Recipe FAQ

Is lentil soup good for you?

Yes, lentil soup is generally a very healthy choice. Lentils are rich in plant-based protein, fiber, and minerals, and this recipe adds extra nutrients from veggies and greens without any heavy cream. If you’re watching sodium, just go easy on the salt and adjust toppings to fit your needs.

Do I need to soak the lentils first?

No. Green and brown lentils cook up beautifully right in the pot without soaking. Just rinse them well and pick out any tiny stones or debris before cooking.

Can I use canned lentils instead of dried?

Yes. Use 3 cans of lentils, rinsed and drained. Add them when you add the tomatoes and broth. Because canned lentils are already cooked, you only need to simmer 15-20 minutes to meld the flavors.

Can I make this in a slow cooker?

You can. For the best flavor, sauté the onion, carrot, peppers, garlic, and spices on the stovetop first, then transfer everything to a slow cooker with the lentils, tomatoes, broth, and water. Cook on LOW for 6-8 hours or HIGH for 3-4 hours, until the lentils are tender. Stir in the greens, lemon juice, and herbs at the end and let them wilt before serving.

Can I make this in an Instant Pot?

Yes. Sauté the onion, carrot, peppers, and garlic on Sauté mode, stir in the spices, then add the lentils, tomatoes, broth, and water. Seal and cook on Manual/Pressure Cook, 12-14 minutes, then let the pressure release naturally for 10 minutes. Finish with the greens, lemon, and herbs on Sauté just until wilted.

Try Some of My Other Popular Recipes

• This Mulligatawny Soup Recipe is an Indian fusion dish of curried lentils and veggies, hearty & flavorful.
• This Ethiopian Misir Wat Recipe is a vibrant red lentil stew with piquant berbere spices and an earthy base of onion, garlic, nigella and cardamom.
• This Masoor Dal Recipe (red lentil curry) is a curry lover's dream with nutty red lentils, hearty potatoes and curry spices.