Try this Slow Cooker Lentil Soup Recipe for a warm and comforting meal sure to be a hit.  This soup is packed with flavor and so easy to make that you will want to make this often.

Slow Cooker Lentil Soup Recipe

We have the perfect recipe to try for Meatless Monday or any day of the week! Slow Cooker Lentil Soup Recipe is so hearty and delicious that no one will ever miss the meat.

The tomatoes give it the best flavor and the lentils are so tender. Even better, the crockpot does all the work making dinner time a breeze.

This meal is budget friendly and easy to feed a crowd. Serve this amazing soup with warm bread like Easy Homemade Dinner Rolls Recipe  and you can’t go wrong.

The bread is perfect for dipping into the lentil soup and getting every last drop. Yum! It is so good.

Can you make lentil soup in a slow cooker?

Absolutely! It is my favorite way to make lentils because the slow cooker does all the work.

Simply toss everything in the crockpot and come home to dinner waiting. I like to start the soup in the morning and then after a long day of work and activities, dinner is ready for us.

Do you have to soak lentils before slow cooking?

No you do not. Just toss the lentils and all of the other ingredients into the crockpot.

This recipe is so easy. You literally just toss and go.

How long do lentils take in slow cooker?

We cook this soup on low for 7-8 hours. You can also cook on high for 5 hours.  

You need a good crockpot for this slow cooker soup.

There are some really good ones on sale right now. If you work all day, you may want to invest in a programmable crock pot.

They are awesome because you can set them to start later, or to stop and switch to warm once the dinners are ready. Amazon has some on sale right now too.

I also really like this crockpot.  Now, it’s not programmable but it’s so handy!

It has the feature where you can lock the lid down.

That feature is so nice for when you take meals to potlucks or need to transport the meal somewhere.

Now if you want to save yourself even more time then I really recommend these Crockpot liners. They make clean up a breeze.

Instead of scrubbing and washing the pot, you can just toss the liner. It is practically no clean up.

If you are short on time, this recipe can easily be adjusted for the instant pot.

Let’s make Slow Cooker Lentil Soup!

Ingredients for Lentil Soup Recipe Slow Cooker:

  • Brown Lentils
  • Onion
  • Carrots
  • Celery
  • Diced Tomatoes
  • Chicken Broth – or Vegetable Broth
  • Minced Garlic
  • Salt and Pepper
  • Fresh Parsley

How to make Easy Slow Cooker Lentil Soup:

  • Cover and cook everything except the parsley on low 7-8 hours or cook on high for 4 hours in the slow cooker.
  • 15 to 30 minute before serving stir in the parsley.

It is that easy to make the best lentil soup recipe slow cooker!

If you are looking for slow cooker lentil recipes vegetarian, this is a must try!

This soup has so much flavor from being slow cooked all day. The onion and tomatoes simmer together to give the lentils such a great flavor.

Try spicy lentil soup slow cooker!

Sometimes for a little extra heat, I will use fire roasted tomatoes. It makes the soup a little more spicy and we all love it.

You can also try slow cooker lentil soup with sausage.

Sometimes for a change, I will add sausage to this soup. I am always changing up recipes to make my family think they are eating different meals. 🙂

We have even added diced sweet potatoes to the soup.  Try using green lentils or red lentils with this easy lentil soup.

The entire family loves lentil and vegetable soup!

Another yummy idea is Crockpot lentil soup with ham!

This soup is so versatile that it easily can work with just about anything. We normally use chicken broth if adding meat to the soup.

This reminds me of Pioneer Woman crockpot lentil soup!

There is just something so comforting about a warm bowl of soup on a cold day. Plus, it is so nice to have dinner ready and waiting when we get home after a crazy busy day.

Tip for low carb slow cooker lentil soup:

This recipe like many calls for diced onions. Another time saving tip is to use a small food chopper or food processor to quickly and easily chop the onions.

If you do not have one of these, I highly recommend them. They are such a time saver and you can get the veggies really fine if you have children that are picky.

I usually just chop the entire vegetable and freeze what I don’t need. It’s so nice to be able to just take the diced onion out of the freezer for recipes.

This is how I meal prep. It’s so quick and easy and helps get dinner on the table fast.

Learn and  how to freeze onions and also how to freeze peppers to save so much time in the kitchen!

Sometimes, I saute the onion in a little olive oil before putting in the crockpot but that is optional.

Print this Healthy lentil soup slow cooker recipe below:

Crock Pot Lentil Soup Recipe

5 from 3 votes
Try Slow Cooker Lentil Soup Recipe for a warm and comforting meal sure to be a hit.  This soup is packed with flavor and so easy to make.
Prep Time 10 mins
Cook Time 7 hrs
Total Time 7 hrs 10 mins
Servings 6
Cuisine American
Course Soup
Calories 314
Author Eating on a Dime


  • 16 ounce brown lentils
  • 1 small onion finely chopped
  • 2 carrots peeled finely chopped
  • 2 stalks celery diced
  • 1 can diced roasted tomatoes (15 oz)
  • 6 cups chicken broth
  • 1 teaspoon minced garlic
  • 1 teaspoon salt
  • 1 teaspoon pepper
  • 1 tablespoon fresh  parsley


  • Add all ingredients to the crock pot except for the parsley.
  • Cover and cook on low 6-8 hours, or cook on high for 3-4 hours until the lentils are cooked through.
  • 15 to 30 minute before serving stir in the parsley.
  • Serve warm and enjoy!

Recipe Notes

*Refrigerate the leftovers in an air tight container for up to 3-4 days.  

Nutrition Facts

Calories 314kcal, Carbohydrates 54g, Protein 22g, Fat 1g, Saturated Fat 1g, Polyunsaturated Fat 1g, Monounsaturated Fat 1g, Sodium 1384mg, Potassium 1047mg, Fiber 25g, Sugar 5g, Vitamin A 3823IU, Vitamin C 25mg, Calcium 97mg, Iron 7mg

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About the Author

Hi, I’m Carrie. Welcome to Eating on a Dime!

I’m on a mission to help you cook delicious meals without busting your budget. Together we are going to cook real food… for real families.

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Recipe Rating


  1. 5 stars
    Love this soup…have made it twice and it is great ! Shared it with friends…and will share it on my blog!