This post may contain affiliate links. Please read our disclosure policy.
This slow cooker lentil soup is cozy, hearty, and full of flavor. Made with simple pantry staples like lentils, carrots, celery, and chipotle peppers in adobo, it’s one of those set-it-and-forget-it meals that delivers big on comfort with minimal effort.
A Note from Isabel
This lentil soup is one of those recipes that reminds me why I love my slow cooker so much. It’s unfussy, wholesome, and always hits the spot. I’ve made it on lazy Sundays and busy weekdays alike, and it never disappoints. The chipotle peppers give it this smoky, slightly spicy kick that makes it feel like it’s been simmering on the stove all day (even though your slow cooker does all the work).
It’s hearty enough to serve as a full meal but still feels light and nourishing. Plus, it’s packed with plant-based protein, fiber, and veggies, so it’s one of those rare recipes that’s both comforting and good for you.
Ingredients You’ll Need
- Dried lentils: Use green or brown lentils since they hold their shape and texture well. (½ pound dried lentils = about 1 cup + 2 tablespoons.)
- Vegetables: Carrots, onions, celery, and a can of fire-roasted diced tomatoes form a flavorful base.
- Chipotle peppers in adobo: Adds warmth, smokiness, and just the right amount of heat. You can adjust the spice level easily by using fewer or more.
- Herbs and spices: Bay leaf, garlic, cumin, and oregano enhance the rich and earthy flavors of the lentils while not being too overpowering.
- Broth: Vegetable broth keeps it vegetarian, but chicken broth works great too.
- Olive oil: Blended in at the end to add richness and a silky texture.
- White wine vinegar: A splash at the end brightens up all the flavors.
How to Make Slow Cooker Lentil Soup
Load the slow cooker: Add everything except the olive oil and vinegar to your slow cooker – the lentils, veggies, chipotle peppers, spices, and broth. Cover and cook on low for 6–8 hours or on high for 3–4 hours, until the lentils are tender. Discard the bay leaf.
Blend: Ladle out about 4 cups of the soup and blend it with the olive oil until slightly smooth and creamy.
Mix: Pour it back into the slow cooker, stir in the white wine vinegar, and season with more salt to taste.
Serve: Ladle into bowls and top with cilantro, sour cream or crema, queso fresco, and warm crusty bread (or tortillas if you want to keep things extra cozy).
Recipe Tips
- No red lentils! They cook differently and will give you a mushy texture.
- Adjust the thickness: Add more broth or water if it’s too thick at the end.
- Make it spicy: Double the chipotle peppers or add a pinch of cayenne for extra heat.
- Add more protein: Stir in cooked chicken, chorizo, or diced ham during the last 30 minutes of cooking.
- Use fresh veggies: Throw in spinach, kale, or even diced potatoes for extra heartiness.
Frequently Asked Questions
Nope! Since the soup cooks low and slow with plenty of liquid, there’s no need to soak them beforehand.
Yes. If left on too long, lentils can turn mushy. Once they’re tender, turn off the slow cooker or switch it to warm.
Yes! Blend a little more of the soup at the end or stir in a splash of cream or coconut milk.
Serving Suggestions
Serve this slow cooker lentil soup with warm crusty bread, bolillos, or warm flour tortillas for dunking.
Add toppings like sour cream or Mexican crema, chopped cilantro, queso fresco, or even diced avocado for a little creaminess.
More Soup Recipes
Slow Cooker Lentil Soup
Ingredients
- ½ pound dried lentils (green or brown)
- 1 yellow onion, diced
- 2 carrots, diced
- 2 celery stalks, diced
- 4 cloves garlic, minced
- 2 chipotle peppers in adobo sauce, minced
- 1 teaspoon ground cumin
- ½ teaspoon kosher salt, plus more to taste
- ½ teaspoon dried oregano
- 1 (14-ounce) can fire-roasted diced tomatoes
- 5 cups vegetable broth (water or chicken broth also work)
- 1 bay leaf
- 2 tablespoons olive oil
- 2 teaspoons white wine vinegar
Instructions
- Add all ingredients except the olive oil and white wine vinegar to the slow cooker. Cover and cook on low for 6-8 hours or on high for 3-4 hours, until the lentils are tender.
- Discard the bay leaf and carefully ladle out about 4 cups of the soup into a large blender. Add the olive oil, cover, and pulse a few times until semi-smooth and creamy looking.
- Pour the blended soup into the crockpot and add the white wine vinegar. Stir to combine, taste, and season with more salt as needed.
- Serve with desired toppings like chopped cilantro, sour cream, shredded parmesan, and crusty bread.
Notes
- Yield: 7 cups total
- Vinegar: Red wine vinegar also works, but I prefer the crisp and clean flavor of white wine vinegar for this version. It pairs well with the chipotle peppers.
- Thickness: If the soup is too thick at the end, feel free to mix in some more broth until it’s just right.
- Spice level: This soup has a mild spice level and just a hint of smokiness from the chipotle peppers. If you’d like it spicy, I recommend doubling the amount of chipotle peppers.
- To store, transfer the soup to an airtight container and refrigerate for up to 4 days. It will thicken as it sits, so just stir in a splash of broth or water when reheating.
- To reheat, warm on the stovetop over medium heat for 10–15 minutes or in the microwave until heated through.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
Photography by Ashley McLaughlin.
Loved this recipe! Great smoky chipotle flavor. Such a great comfort soup on a cool evening!
I don’t have any of the chipotle pepper in adobe sauce ingredient. But I do have ground chipotle pepper. Will that work as a substitute or do you have another suggestion?
Hi! You can use chipotle powder with a little bit of tomato paste or sauce as a substitute in this case. Just give it a mix and then a taste. It should be spicy, but not too spicy.
How many cups of broth are to be used?
Hi! This recipe calls for 5 cups of vegetable or chicken broth.
This was delicious and so simple. Does it freeze well?
Hi Lisa, yes it does!
This sounds delicious! Can this be made in a regular crockpot/ Dutch oven (i don’t have a slow cooker)? How long to cook it for and at what temp?
Amazing! I turned myself on with how good this came out, lol. I didn’t have any carrots, so I tossed in the last 4ish tablespoons of homemade pumpkin puree and a leftover half-eaten sweet potato (that had cinnamon in it). I also didn’t have chipotles in adobo or fire roasted tomatoes, so I added a jalapeno, a splash of mirin, a farm fresh heirloom tomato, and a little bit of tomato paste. So good!!!
We made this the other night and I just want to tell you that it was OUTSTANDING. We’re definitely going to make this part of our regular soup rotation. The white wine vinegar at the end sent it over-the-top delicious. Thanks so much for sharing this recipe! It’s a keeper! 🙂
Is the blending step necessary?
Hi Kaitlyn, the blending step isn’t necessary but it definitely helps with texture.
This is the 4th time I’ve made it and everybody loves it!
Is there a difference between red and white wine vinegar? I see you’ve used them interchangeably? Which one is preferred?
I typically prefer white wine vinegar because it has a slightly more subtle flavor than red wine vinegar.
Made this tonight as is and was so flavorful and delicious. Only thing I will do differently next time is double the recipe for more leftovers!
That makes me so happy, Amber. So glad you liked it!