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Welcome to my kitchen! I am MARINKA and the food blogger behind Quentsons Recipes. The blog launched in 2012 as a place to share my passion for cooking.

 Crock-Pot Lentil Soup Recipe | The Recipe Critic

Crock-Pot Lentil Soup is a simple yet elegant dish prepared in a slow cooker. French lentils are simmered with chopped vegetables for a hearty and wholesome appetizer.

Looking for more slow cooker soup recipes? Then try this Potato Leek Soup, Pasta E Fagioli, or Chicken and Rice.

Crock-Pot Lentil Soup

Crock-Pot Lentil Soup

When you’re looking for a simple and satisfying appetizer, this slow cooker lentil soup recipe is a tasty solution. The diced vegetables, garlic, and herbs are first cooked briefly in the microwave to coax out more flavor before they’re added to the vessel.

Using a Crock-Pot to simmer the lentils ensures that they become perfectly tender without the need to keep an eye on the stovetop. Thick-sliced mushrooms and kale are added at the end of cooking so that they soften but don’t become overcooked. This soup is loaded with legumes and vegetables for a gluten-free French-inspired dish.

pouring soup liquid into a slow cooker

What are the best lentils to use?

French green lentil or Lentilles du Puy are recommended for this recipe. They’re small, greenish-black, mottled legumes. They deliver an earthy flavor, and when cooked hold their shape and have a firm- yet tender texture.

Brown or green lentils can also be used, but they have more of a creamy texture. I like to use them in my stovetop lentil soup. Do not use red lentils as they will completely fall apart after cooking.

How do you make lentil soup in a slow cooker?

  • Microwave the olive oil, celery, carrots, onions, garlic, and herbs until tender.
  • Add vegetable mixture, lentils, diced tomatoes, vegetable broth, salt, and pepper to the slow cooker.
  • Cover and cook until the lentils are tender; 4 to 6 hours on high, 7 to 9 hours on low.
  • Add mushrooms and kale, cook on high until tender.
  • Serve soup garnished with whopped parsley.

lentil soup inside a slow cooker

Adding in flavor

This French lentil soup gets a burst of flavor from the mixture of vegetables and herbs. Adding in red onion, celery, carrots, and garlic create a classic aromatic base. Diced tomatoes add balanced sweetness and acidity.

The mushrooms provide a savory umami flavor without adding in meat. Dried herbs de Provence gives it a fragrant rustic flavor from the lavender flowers, thyme, rosemary, basil, parsley, oregano, tarragon, and marjoram.

Serving lentil soup out of a crock pot

Can this soup be refrigerated or frozen?

The lentil soup can be stored in an airtight container and refrigerated for up to 5 days. Individual portions can be stored in the freezer for up to 1 month, defrost then reheat before serving.


Crock-Pot Lentil Soup in a white bowl

Looking for some tasty entrees to serve with the soup? Try these!

Crock-Pot Lentil Soup

Prep Time 30 minutes

Cook Time 4 hours 30 minutes

Total Time 5 hours

Author Jessica Gavin

Servings 8 servings

Crock-Pot Lentil Soup is a simple yet elegant dish prepared in a slow cooker. French lentils are simmered with chopped vegetables for a hearty and wholesome appetizer.

  • 2
    extra-virgin olive oil
  • 1
    diced red onion
    ¼-inch dice
  • 1/2
    diced celery
    ¼-inch dice
  • 3/4
    diced carrots
    ¼-inch dice
  • 1
    minced garlic
  • 1
    dried herbs de Provence
  • 1
    French lentils or lentils du puy
    picked over and rinsed
  • 14.5
    can diced tomatoes
    with juice
  • 8
    vegetable broth or stock
  • ½
    kosher salt
  • ¼
    black pepper
  • 1 ½
    sliced brown mushrooms
  • 4
    chopped kale
    ½-inch wide pieces
  • 1
    chopped parsley

Serves: 8

Calories88kcal (4%)Carbohydrates13g (4%)Protein3g (6%)Fat4g (6%)Saturated Fat1g (5%)Sodium1187mg (49%)Potassium413mg (12%)Fiber1g (4%)Sugar5g (6%)Vitamin A5983IU (120%)Vitamin C49mg (59%)Calcium85mg (9%)Iron1mg (6%)

All nutritional information is based on third party calculations and is only an estimate. Each recipe and nutritional value will vary depending on the brands you use, measuring methods and portion sizes per household.


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