Creamy Leek and Potato Soup (Soupe Vichyssoise)

This Creamy Leek and Potato Soup, known in French as Soupe Vichyssoise, is made with gently cooked leeks and potatoes, puréed until silky smooth and enriched with cream. Simple, elegant and deeply comforting, this classic French soup is perfect enjoyed warm on a chilly day, even though it’s traditionally served cold.

With just a handful of humble ingredients, this recipe proves that some of the most beloved dishes in French cooking are also the simplest.

Audrey’s notes
This leek and potato Soupe Vichyssoise is a true weeknight staple in my house, especially once fall and winter roll around. It’s wonderfully creamy and comforting, but never feels heavy or over-the-top. The leeks add a gentle sweetness and mild onion flavor, while the potatoes give the soup its body and that naturally velvety texture.
Since leeks and potatoes are both affordable and easy to find, this is the kind of recipe that feels practical as well as cozy. To me, Soupe Vichyssoise is a perfect example of how simple, everyday cooking can lead to the most beloved dishes.
It’s a must-have in any French cooking repertoire. While it’s traditionally served cold in the summer, I personally love it warm during the colder months, finished with a handful of crunchy croutons.
Bon appétit!

The origin of the Soupe Vichyssoise.

Soupe Vichyssoise is a staple of the French culinary repertoire, but its true origin has long sparked a friendly (and ongoing) culinary debate between France and the United States.

One legend traces the soup back to King Louis XV of France, who reportedly had his servants taste his potato and leek soup first, fearing it might be poisoned. By the time the soup safely reached his table, it had gone cold – and was still enjoyed.

A more widely accepted story credits Louis Diat, a French chef working at the Ritz-Carlton in New York City, in the early 1900s. Diat is said to have added this chilled soup to the menu as a refined version of the leek and potato soup his mother and grandmother used to make during his childhood near Vichy, a spa town in the Auvergne-Rhône-Alpes region of southeastern France. He named it Vichyssoise in homage to those memories.

Whether French or French-American by birth, one thing is certain: this soup has earned its place as a timeless classic.

Ingredients You’ll Need for This Leek and Potato Soup (Soupe Vichyssoise)

This classic French leek and potato soup is made with simple, affordable ingredients that come together to create a smooth, creamy, and comforting dish.

• Garlic and Onion. Lightly sautéed onion and garlic in butter form the aromatic base of this leek and potato soup. They add depth and savory flavor while letting the leeks remain the star of the recipe.
• Leeks. You’ll need 2 large leeks (or 3 smaller ones). Large leeks are ideal for making leek soup, as they soften beautifully and purée into a smooth texture.
  Be sure to clean leeks thoroughly, especially between the layers, where grit often hides.
  Tip: Avoid refrigerating leeks for too long—cold storage can make them lose their delicate texture and turn tough. Save smaller leeks for recipes like leeks vinaigrette.
• Potatoes. Choose starchy potatoes such as Russets, Yukon Gold, or Idaho potatoes. These varieties are essential for achieving the naturally creamy texture that defines Soupe Vichyssoise.
• Stock. A good-quality vegetable stock keeps this soup light and lets the flavor of the leeks shine. For a richer variation, chicken stock can also be used.
• Heavy Cream. A small amount of heavy cream adds richness and silkiness to the soup without overpowering the vegetables. For a lighter leek and potato soup, substitute whole milk or reduce the quantity.
• Seasonings. This recipe relies on simple seasonings: salt, freshly ground black pepper, and a pinch of nutmeg. Nutmeg is a classic addition to French potato soups and enhances the natural sweetness of the leeks.

For the croûtons:

• Day-old bread. Croutons are best made with one- or two-day-old bread (that’s not very fresh and soft anymore). It’s easier to cut in small cubes and ends up crisper. 
• Butter. To help crisp up the bread cubes. 
• Salt and Pepper. Season to taste.

How to make Soupe Vichyssoise

Here are the quick steps to make this creamy Leek & Potato Soup. You can find the detailed instructions and ingredient list in the recipe card below. 

• Prep leeks: Trim, halve, wash well, and slice thinly.
• Sauté veggies: Melt butter; cook onion and garlic until soft. Add leeks and cook until tender and lightly caramelized.

• Add potatoes: Stir in potatoes and cook briefly.
• Simmer: Add stock, salt, and pepper. Bring to a boil, then simmer covered until potatoes are tender.
• Blend: Purée soup until smooth; stir in cream and nutmeg. Adjust seasoning.

• Make croutons: Sauté bread in butter with salt until golden and crisp.

• Serve: Enjoy soup hot or chilled, topped with croutons and fresh herbs

Cooking Notes & Variations

• My version of Soupe Vichyssoise is on the lighter side, using “only” ½ cup of heavy cream. Feel free to add more if you prefer a richer soup.
• For an even lighter option, you can substitute:
  • Water for the vegetable stock
  • Whole milk for the heavy cream
• This soup keeps well in the refrigerator for up to 3 days and tastes even better the next day.
• To serve traditionally, chill completely and enjoy cold with fresh herbs.

I hope you’ll love this Creamy Leek and Potato Soup (Soupe Vichyssoise) as much as I do! If you have any questions, please leave a comment. 

More French Soups to try: 

• Classic French Onion Soup
• French Cream of Cauliflower Soup 
• French Cabbage and Sausage Soup (Soupe Paysanne)
• Classic French Lentil Soup 
• Creamy Roasted Cauliflower Soup 
• Classic French Carrot Soup (Soupe Crécy)
• Provençal Garlic Soup (Aïgo Boulido)
• Watercress Soup (Soupe de Cresson)
• Split Pea Bacon Soup (Potage Saint Germain)
• Smoked Ham Hock Bean Cabbage Soup (Garbure)
• Creamy Leek and Potato Soup (Soupe Vichyssoise)

Creamy Leek and Potato Soup (Soupe Vichyssoise)

Print Recipe

Serves: 4 people Prep Time: 20 Minutes Cooking Time: 40 Minutes 40 Minutes

Nutrition facts: 200 calories 20 grams fat

Rating: 4.0/5

( 15 voted )

Ingredients

2 large leeks or 3 small (about 500g)
2 tbsp butter (salted or unsalted)
1 onion, peeled and diced
2 garlic cloves, peeled and diced
3 potatoes, peeled and diced (about 800g)
½ tsp salt
½ tsp freshly ground black pepper
4 cups (1L) vegetable stock
½ cup heavy cream (or more, to taste)
1/4 tsp nutmeg
For the croutons:
1 tsp unsalted butter
1 cup cubed day-old bread, such as baguette
1/4 tsp fine sea salt
Optional: Fresh herbs, for garnish

Instructions

1. Remove the ends of the leeks, open them in half lengthwise and wash thoroughly under water to remove any dirt in-between the leaves. Cut into thin slices.
2. In a heavy bottomed pot, melt the butter over medium heat. Add the onion and garlic and sauté for about 2 minutes until translucent. Add the leeks and sauté for about 10 minutes until soft and slightly caramelized.
3. Add the diced potatoes and sauté for about 2 minutes.
4. Pour in the vegetable stock, add salt and pepper and bring to a boil. Lower to medium-low heat, cover with a lid and simmer for 20-25 minutes or until the potatoes are fork tender. Turn off the heat.
5. Purée the soup until smooth, using an immersion hand blender or working in batches using a regular blender. Add 1/2 cup heavy cream (or more, to taste) and nutmeg. Taste, and adjust seasoning if needed (salt, pepper).
6. Make the Croutons. In a small skillet, melt the butter over medium heat. When it foams, add the bread and salt. Cook, stirring frequently, until golden, about 3 to 5 minutes. The croutons will crisp up as they cool.
7. Enjoy the soup hot or chilled, with some croutons on top. For chilling, wait for the soup to cool to room temperature and chill for at least two hours before serving.
8. For serving, garnish with fresh herbs, such as parsley, chive or dill.