Creamy Lentil Soup with Potatoes & Thyme

This creamy lentil soup with potatoes and thyme is a bowl of flavorful and nourishing comfort made with a few simple ingredients cooked with care to bring out their best qualities.

This lentil soup is made with a few pantry and fridge staples but you wouldn't know it from the taste because it's so rich and complex.

The aromatic base of shallots and garlic are pre-sauteed to bring out sweetness and complexity. Then the lentils and potatoes go in (with a bit more garlic) and slowly simmer with thyme and some bouillon for added flavor.

Finally, a splash of cream and one last hit of garlic give the soup a creamy but still very flavorful finish.

This soup comes together very quickly with little hands-on time making it perfect for a one pot weeknight meal, easily converted to vegetarian or made heartier with the addition of chicken.

Besides being flavorful and comforting, you can feel good about the fact that each serving gives you 22 grams of fiber and almost 20 grams of protein for less than 400 calories.

Quick Summary

• Hearty one-pot meal soup made with green lentils, potatoes, shallots, garlic, and cream
• Flavor built from browning aromatics and simmering with thyme and bouillon
• Partially blended at the end for a creamy, rustic texture
• Minimal hands-on time — perfect for weeknights
• Easily adapted to be vegetarian / plant-based or include chicken and extra veggies

Jump to:

• Quick Summary
• Ingredients
• Equipment
• Instructions
• Serving Suggestion
• Related
• Recipe
• Comments

Ingredients

Green lentils: The base of the soup. They contribute an earthy, peppery flavor.

Shallots: A more complex aromatic but can be replaced with sweet yellow onions instead.

Garlic: Used in layers to build flavor.

Potatoes: Cut varied sizes to add textural complexity to the soup.

Butter: Used to sauté the aromatics and deepen flavor through browning.

Whipping cream: Stirred in at the end to bring a creamy richness to the soup. Make a creamy vegan / plant-based lentil soup by replacing with plant-based cooking cream like Oatly cooking cream.

Bouillon cube: Adds umami and seasoning. I used Calnort chicken bouillon but you substitute any other chicken or vegetable bouillon to make it vegetarian. Be sure to adjust salt accordingly.

Thyme (dried or fresh): Adds an earthy, herbal and slightly astringent quality that enhances the other flavors.

Black pepper: A bit of warmth and spice.

Salt: Add to taste, depending on your bouillon.

Equipment

Large pot (at least 3 liters / 3.2 quarts): For simmering the soup and accommodating the swelling lentils

Immersion blender (optional): To partially blend the soup for a creamier texture. Alternatively you can spoon a few ladlefuls (including both solids and liquids) into a regular blender and blend it up to add some smoothness to the soup. Be careful of splashes if the soup is very hot.

Instructions

Prepare the vegetables

Finely dice the shallots and mince, mash, or grate the garlic. Set aside about one-third of the garlic for finishing the soup later.

Cut the potatoes into small cubes, using a mix of finely diced and slightly larger pieces for texture. The small pieces break down to contribute to the creamy base while the larger pieces add texture to the soup.

Sauté the aromatics

In a large pot (at least 3 liters / 3.2 quarts), melt a generous knob of butter (about 2 tablespoons) over medium-high heat.

Add the shallots and one-third of the garlic.

Cook for 2–3 minutes, stirring often, until soft, fragrant, and just starting to brown. This browning adds depth and builds umami that carries through the soup.

Add the main ingredients

Add the lentils, potatoes, thyme, bouillon cube, black pepper, another one third of the garlic and salt to taste.

Pour in about 1.25 liters of water / about 5 cups (enough to generously cover the ingredients) and bring to a boil.

Simmer the soup

Once boiling, reduce the heat to a simmer and cover the pot.

Simmer gently for 25-30 minutes, or until the lentils and potatoes are fully cooked and soft.

The lentils will swell and absorb liquid, so you may need to add up to 500 ml (2 cups) more water as it cooks, or more if you like a thinner soup.

Finish and blend

When the lentils and potatoes are tender, stir in the cream along with the remaining garlic.

Taste and adjust seasoning — more salt, pepper, or thyme as needed.

Use an immersion blender to blend a portion of the soup directly in the pot. Just a few pulses will add creaminess while preserving some texture. Blend more if you prefer a smoother finish.

Variations and Substitutions

• Add more vegetables: You can bulk up the soup with extra vegetables like finely diced carrots and celery added at the same time as the shallots. Or stir in diced zucchini about halfway through cooking for a more summery version.
• Add chicken: To make it heartier, brown some chicken breast or thigh (cut into bite-sized pieces or left whole) in the pot before adding the aromatics. Remove it to a plate, then proceed with the recipe as written. Add the chicken back in along with the lentils and potatoes to simmer together until fully cooked through.
• Make it vegetarian: Simply swap the chicken bouillon cube for a vegetable bouillon or stock concentrate. The rest of the recipe is naturally vegetarian.
• Use brown lentils instead: If you don’t have green lentils, brown lentils are a great substitute. Just note that they soften a little more as they cook, giving a slightly thicker soup.
• Dairy-free version: Omit the cream or substitute with unsweetened plant-based cream (like oat or soy). You can also blend a larger portion of the soup to achieve a naturally creamy texture without dairy.
• No immersion blender? Use a regular blender to purée a few scoops of the soup, then stir the blended portion back into the pot. Be careful when blending hot liquid — work in small batches and vent the lid slightly to avoid pressure build-up.

Serving Suggestion

Serve this soup warm, ideally with crusty bread for dipping — a rustic sourdough or seeded wholegrain loaf works especially well to soak up the creamy broth.

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