Creamy Leek and Potato Soup

Creamy leek and potato soup turns humble ingredients into a smooth, comforting bowl in under an hour. Leeks bring gentle onion flavor, russet potatoes provide body, and a little heavy cream gives the finished soup a rounded texture without hiding the vegetables. It is a practical vegetarian dinner for a chilly evening, and croutons, parsley, and chives add crunch and freshness at the table.

What is creamy leek and potato soup?

This blended vegetable soup is built around leeks, russet potatoes, vegetable broth, and cream. The leeks soften in butter and olive oil before the potatoes simmer until tender. Blending the cooked vegetables creates a naturally thick base, while the cream adds a smooth finish. The result is mild enough for lunch but satisfying enough for a simple main course.

Why this soup works

The flavor develops in clear stages. Softened leeks bring sweetness, garlic adds savory depth, and fresh thyme perfumes the broth. Russet potatoes contribute enough starch to make the soup velvety without flour. Low-sodium broth leaves room to adjust seasoning at the end, which is useful because different broths vary in saltiness.

The method is forgiving. The leeks only need to soften, and the potatoes are ready when a fork slides through them easily. Removing the thyme before blending prevents woody pieces from ending up in the bowl. Adding heavy cream after the pot comes off the heat keeps the dairy smooth.

How to make creamy leek and potato soup

Ingredients

• 1 tablespoon butter
• 1 tablespoon olive oil
• 2 large leeks, thinly sliced, white and pale green parts only
• 1 teaspoon salt
• 1/2 teaspoon fresh ground black pepper
• 1 tablespoon fresh garlic, minced
• 2 pounds russet potatoes, peeled and cut into 1-inch cubes
• 6 cups low-sodium vegetable broth
• 3 sprigs fresh thyme
• 1/2 cup heavy cream
• Optional croutons, chopped fresh parsley, and chopped fresh chives for garnish

Method

Wash the leeks carefully because grit can hide between the layers. Keep potato cubes close to the same size so they soften together.

• Melt the butter in a soup pot over medium heat, then add the olive oil.
• Add the sliced leek, season with salt and pepper, and sauté for about 6 minutes until softened, stirring frequently.
• Stir in the garlic and cook for 15 seconds, then stir in the cubed potatoes for 20 seconds.
• Pour in the broth, add the thyme sprigs, and bring the soup to a boil.
• Cover, lower the heat to a gentle simmer, and cook for 22 to 25 minutes until the potatoes are very soft.
• Remove the pot from the heat and take out the thyme sprigs.
• Use an immersion blender to blend the soup until smooth, then stir in the heavy cream.
• Taste and adjust the salt and pepper, ladle soup into bowls, garnish with croutons, parsley, and chives, and serve.

Serving ideas

Serve a bowl as a light main course with warm bread, a crisp green salad, or a simple sandwich. Croutons give the smooth soup contrast, while parsley and chives add color and a fresh finish. For a weeknight use case, make the pot earlier in the day and rewarm it gently just before dinner, adding garnishes at the table. The soup also makes a useful starter for a larger meal because its flavor is gentle and its texture is easy to pair with bread.

Tips for a smooth result

Use only the white and pale green leek parts for the most tender texture. Stir often while they soften so they do not catch on the bottom. Keep the broth at a gentle simmer after it reaches a boil. Blend only after the potatoes are very soft, then taste after the cream is stirred in and adjust seasoning gradually. If the soup seems thin, let it stand briefly after blending; the potato starch will continue to give the broth body.

Optional variation

Optional variation: blend only part of the pot and leave some tender potato pieces visible for a rustic texture. This changes the mouthfeel while keeping the same primary ingredients and method. The croutons, parsley, and chives are optional, so the bowl can stay simple when you want a lighter finish.

Storage and reheating

Cool leftovers promptly and refrigerate them in a covered container. Reheat portions gently on the stovetop or in the microwave, stirring between intervals. Avoid a hard boil after the cream has been added. If the soup thickens in the refrigerator, loosen it with a small splash of vegetable broth while reheating. Add fresh garnishes after warming rather than storing croutons in the soup.

Search answers

Can you make leek and potato soup without a blender?

Yes. Mash the fully tender vegetables with a potato masher for a rustic texture, or blend hot soup in small batches in a countertop blender with care.

What potatoes are best for leek soup?

Russet potatoes are used here because their starch gives the blended soup body. Cut them into even 1-inch cubes so they finish at the same time.

How do you thicken potato soup?

Blend the softened potatoes into the broth. Their natural starch thickens the soup without flour, and the heavy cream rounds out the texture at the end.

FAQs

This creamy leek and potato soup is at its best when the vegetables are fully tender and the bowl is balanced with a little crunch. Keep the base simple, blend until smooth, and let the optional garnishes make each serving feel finished.

Creamy Leek and Potato Soup

A smooth vegetarian creamy leek and potato soup made with russet potatoes, fresh thyme, vegetable broth, and a little cream.

Prep : 10 Total : 25 minutes

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Ingredients

  

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Ingredients

• 1 tablespoon butter
• 1 tablespoon olive oil
• 2 large leeks thinly sliced, white and pale green parts only, about 2 cups
• 1 teaspoon salt
• 1/2 teaspoon fresh ground black pepper
• 1 tablespoon fresh garlic minced
• 2 pounds russet potatoes peeled and cut into 1-inch cubes
• 6 cups low-sodium vegetable broth
• 3 sprigs fresh thyme
• 1/2 cup heavy cream
• croutons for garnish
• fresh parsley chopped, for garnish
• fresh chives chopped, for garnish

Instructions

 

Instructions

• Melt the butter in a soup pot over medium heat, then add the olive oil.
• Add the sliced leek, season with salt and pepper, and sauté for about 6 minutes until softened, stirring frequently.
• Stir in the garlic and cook for 15 seconds, then stir in the cubed potatoes for 20 seconds.
• Pour in the broth, add the thyme sprigs, and bring the soup to a boil.
• Cover, lower the heat to a gentle simmer, and cook for 22 to 25 minutes until the potatoes are very soft.
• Remove the pot from the heat and take out the thyme sprigs.
• Use an immersion blender to blend the soup until smooth, then stir in the heavy cream.
• Taste and adjust the salt and pepper, ladle soup into bowls, garnish with croutons, parsley, and chives, and serve.