Potato Leek Soup Recipe (Classic French-Style)

Cozy, elegant comfort: ready in ~40 minutes

Silky potato-leek soup with gentle garlic, sweet sautéed leeks, and a clean, buttery finish, simple enough for weeknights, polished enough for a dinner party.

Velvety potato leek soup in a white bowl with chive oil and croutons on marble, spoon and napkin nearby, soft natural light.

Why you’ll love it

  • French Recipes: Streamlined take on the bistro classic with proper leek prep and optional wine deglaze.
  • Vegetarian Soups: 100% meatless with vegetable broth; naturally thick and satisfying.
  • Healthy Comfort Food: Creamy texture from potatoes and milk (no heavy cream required).
  • Dinner Party Ideas: Lux finish (chive oil, crème fraîche) and easy make-ahead for stress-free hosting.
  • Classic Soups: Familiar, timeless flavor that freezes well and reheats beautifully.

Ingredients (notes only)

Produce & aromatics

  • Leeks (white + light green only; wash thoroughly to remove grit), Yukon Gold potatoes (buttery texture), garlic, optional celery.
    Fat & liquid
  • Butter or olive oil; low-sodium vegetable broth; dry white wine (optional).
    Dairy
  • Whole milk (or 2% for lighter); a spoon of crème fraîche or Greek yogurt to finish (optional).
    Seasoning & garnish
  • Kosher salt, black pepper, bay leaf, thyme; lemon for brightness (optional); chives, extra-virgin olive oil, homemade croutons for serving.

Step-by-step

  1. Prep leeks: Slice lengthwise, rinse between layers to remove sand, then thinly slice.
  2. Sweat the leeks: In a 5–6 qt pot, melt butter over medium. Cook leeks and celery with a pinch of salt 7–8 min until soft and sweet (no browning). Add garlic 30 sec.
  3. Deglaze (optional): Stir in white wine; simmer 1–2 min to cook off alcohol.
  4. Simmer: Add potatoes, broth, bay leaf, thyme, salt, and pepper. Bring to a boil; reduce to a gentle simmer 12–15 min until potatoes are tender.
  5. Blend: Remove bay leaf. Blend smooth with an immersion blender (or carefully in batches).
  6. Make it silky: Stir in milk over low heat; do not boil after dairy. Adjust salt and pepper.
  7. Finish & serve: Off heat, whisk in a spoon of crème fraîche or yogurt if using. Ladle into bowls; garnish with chives, olive oil swirl, and croutons.

Pro tips

  • Leek 101: Use only white + light green parts; rinse thoroughly—grit hides between layers.
  • Texture control: For velvety soup, blend fully; for rustic, blend half and leave some potato pieces.
  • No gummy soup: Avoid over-blending starchy potatoes in a high-speed blender; pulse until just smooth.
  • Flavor lift: A ½ tsp lemon zest or a squeeze of lemon brightens without extra salt.
  • Creamy without cream: Yukon Golds + milk give body; add 1 Tbsp butter at the end for gloss.
  • Make it luxe: Finish with chive oil (blend chives + oil, strain) for a restaurant look.

Variations (mapped to interests)

  • Classic Vichyssoise (French Recipes / Classic Soups): Serve chilled; swap milk for light cream and finish with crème fraîche.
  • Extra-Light (Healthy Comfort Food): Use olive oil + 2% milk; replace 1 cup potato with cauliflower; garnish with yogurt.
  • Vegetarian Soups (fully plant-based): Use olive oil and unsweetened plant milk (oat or cashew). Skip dairy garnishes.
  • Dinner Party Ideas: Serve in espresso cups or shot-glass “soup shooters” with chive oil and tiny croutons.

How to serve

  • With warm baguette or garlic toasts; garnish bowls with chives, olive oil, cracked pepper, and a dollop of crème fraîche.

Make ahead & storage

  • Fridge: 4 days airtight. Reheat gently; thin with broth or milk as needed.
  • Freeze: Best before adding dairy (up to 2 months). Stir in milk after reheating.
  • Reheat: Warm over low heat; avoid boiling to keep a silky texture.

FAQs

What potatoes work best?
Yukon Golds give a naturally creamy body and buttery flavor; russets also work but can get gluey if over-blended.

How do I clean leeks properly?
Slice lengthwise; fan layers under cool running water, then thinly slice and rinse again in a bowl—grit sinks.

Can I make it dairy-free?
Yes—use olive oil and unsweetened plant milk (oat/cashew). Finish with olive oil instead of crème fraîche.

How do I thicken without cream or flour?
Blend more potatoes or simmer briefly uncovered to reduce.

Can I use the dark green leek tops?
They’re tough; save for broth. Use only white and light green for this soup.

Simple Nutrition (estimate per serving, 1/6 recipe)

Calories 250 • Protein 7g • Carbs 38g • Fat 9g • Fiber 4g • Sodium 560mg • Sugar 6g

Sarah

Potato Leek Soup Recipe (Classic French-Style)

Silky, comforting potato-leek soup with sweet sautéed leeks and buttery potatoes. Naturally creamy without heavy cream—weeknight simple and dinner-party elegant, with Instant Pot and slow cooker options.
Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Servings: 6 servings
Course: Dinner, Soup
Cuisine: American, French-Inspired
Calories: 250

Ingredients
  

  • 3 large leeks, white & light green parts only, thinly sliced (about 4 cups)
  • 2 Tbsp unsalted butter (or olive oil for dairy-free)
  • 1 medium rib celery, diced (optional)
  • 2 cloves garlic, minced
  • ½ cup dry white wine (optional)
  • 2 lb Yukon Gold potatoes, peeled and ½-inch diced
  • 4 cups low-sodium vegetable broth
  • 1 cup whole milk (or 2% for lighter)
  • 1 bay leaf
  • ½ tsp dried thyme (or 1 tsp fresh)
  • 1–1¼ tsp kosher salt, to taste
  • ½ tsp black pepper
  • 1–2 Tbsp crème fraîche or Greek yogurt, for finishing (optional)
  • Chopped fresh chives, olive oil, and croutons, for serving

Equipment

  • 5–6 qt pot or Dutch oven
  • immersion blender
  • fine mesh strainer optional, for chive oil
  • cutting board
  • chef’s knife
  • measuring cups
  • measuring spoons

Method
 

  1. Melt butter in a large pot over medium heat. Add leeks, celery, and a pinch of salt; cook 7–8 minutes until soft but not browned. Stir in garlic 30 seconds.
  2. Pour in wine (if using); simmer 1–2 minutes to reduce.
  3. Add potatoes, broth, bay leaf, thyme, 1 tsp salt, and pepper. Bring to a boil, then simmer 12–15 minutes until potatoes are tender.
  4. Remove bay leaf. Blend with an immersion blender until smooth (or blend half for some texture).
  5. Stir in milk over low heat; do not boil. Taste and adjust seasoning.
  6. Off heat, swirl in crème fraîche or yogurt if using. Serve with chives, olive oil, and croutons.

Nutrition

Calories: 250kcalCarbohydrates: 38gProtein: 7gFat: 9gSaturated Fat: 4gPolyunsaturated Fat: 1gMonounsaturated Fat: 2gCholesterol: 15mgSodium: 560mgPotassium: 680mgFiber: 4gSugar: 6gVitamin A: 900IUVitamin C: 13mgCalcium: 110mgIron: 1.6mg

Notes

Vegetarian / Dairy-Free: Use olive oil; swap milk for unsweetened oat or cashew milk; skip crème fraîche.
Gluten-Free: No flour needed—blend to thicken.
Equipment: 5–6 qt pot or Dutch oven; immersion blender; fine-mesh strainer (for chive oil, optional).
Lemon option: Add 1 tsp lemon juice or ½ tsp zest at the end to brighten.

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