Potato Leek Soup

There’s just something deeply comforting about a steaming bowl of potato leek soup on a crisp fall day. This recipe nails it perfectly: incredibly creamy without cream, quietly flavorful, and wonderfully simple. It’s mainly just leeks and Yukon Gold potatoes with a few tasty extras, making it easy to bring together with little fuss but big cozy vibes.

Below, I’ll walk you through everything you need to know—from how to clean those leeks well to blending the soup into a velvety dream. Plus, I’ll share some favorite garnishes, serving ideas, and tips for prepping ahead or freezing so you can enjoy this one again and again.

Here’s a quick look at what you’ll get:

• A clear, hands-on guide to prepping and gently sautéing leeks so they stay soft and sweet, never bitter.
• A simple stovetop method for tender potatoes and a creamy finish using either an immersion or regular blender.
• Tasty variations, garnish ideas, and pairing suggestions so you can enjoy this potato leek soup any way you like—whether as a casual weeknight meal or something a little more special.

Keep scrolling for the printable recipe, an easy-to-follow video, and some pro tips that’ll make this fall soup your new favorite go-to!

What You’ll Love About It

When leek season rolls around and the weather turns chilly, this potato leek soup is my first pick. It’s gently sweet and lusciously creamy, kind of like my tomato or butternut squash soups, but with the comforting, hearty feel of mashed potatoes in every spoonful. The French have truly mastered this classic, and since I adore French food (hello ratatouille!), I always come back to this. Here’s why it’s become a regular in my kitchen during the fall:

• Only 6 simple ingredients needed. The bulk of this soup is just leeks and potatoes, with a few aromatics thrown in for extra loveliness. No fuss, no fancy stuff—just good ingredients.
• So many ways to enjoy it. I often serve it with a fresh kale salad, but there are lots of tasty pairings and garnish ideas that I’ll share below to keep things interesting.

Ingredient Essentials

• 2 tablespoons extra-virgin olive oil
• 3 large leeks
• 2 garlic cloves, minced
• 4 cups vegetable broth, or more for a thinner texture
• 2 pounds Yukon Gold potatoes, peeled and diced into ½-inch pieces
• 1 teaspoon kosher salt
• 1 bay leaf
• 2 sprigs of fresh thyme
• freshly chopped chives and black pepper for garnish

From Prep to Finish

1. Trim dark green tops from leeks and trim roots, leaving the white base intact; slice leeks lengthwise and chop crosswise into ~1/4‑inch pieces.
2. Rinse chopped leeks thoroughly in a colander under cold running water to remove grit.
3. Peel Yukon Gold potatoes and dice into 1/2‑inch pieces.
4. Heat olive oil in a large pot or Dutch oven over medium heat.
5. Add leeks and sauté 8–10 minutes until softened and translucent, lowering heat if they begin to brown.
6. Stir in minced garlic and cook 1 minute.
7. Add diced potatoes, salt, bay leaf, thyme sprigs, and vegetable broth.

8. Bring to a boil over medium‑high heat, then reduce to low, cover, and simmer 15–20 minutes until potatoes are tender.

   

9. Remove the bay leaf and thyme stems.
10. Puree the soup until smooth with an immersion blender in the pot, or blend in batches in a countertop blender (cool slightly, fill halfway, vent the lid, and cover with a towel to prevent splatter).
11. Taste and adjust seasoning as needed.
12. Ladle soup into bowls and sprinkle with chopped chives and freshly cracked black pepper.

Tips for Perfect Soup

Here are some handy tips to make sure your potato leek soup turns out perfect every time:

• Be thorough cleaning your leeks: slice and fan out those layers, rinse under cold running water or soak and swish to get out every bit of grit.
• Keep the leeks soft and tender, not browned: cook gently over medium heat for 8–10 minutes until translucent; reduce heat if you spot any browning to avoid bitterness.
• Season carefully: add a pinch of salt early for flavor, but wait to fully salt after blending so you don’t overdo it.
• Choose Yukon Gold potatoes—they’re buttery and creamy. Russets are okay but tend to break down more and get mealy. If you want more texture and chunks, waxy potatoes like red potatoes work great.
• Control soup texture easily: blend it completely silky, pulse for a chunkier texture, or save a scoop of cooked potato aside and stir it back in after blending for a mix of smooth and chunky.
• Blending hot soup safely: if you use a countertop blender, cool the soup for a few minutes, fill the container halfway, vent the lid or remove the center piece, and cover with a kitchen towel to keep things from splattering.
• Adjust thickness: thin with extra broth or water if you want it lighter; thicken it by blending longer, simmering to reduce, or stirring in a little mashed potato.
• Make ahead and freeze: let soup cool completely before storing in airtight containers. Keep it in the fridge 3–4 days or freeze for up to 3 months—just leave room on top for expansion.
• When reheating, warm slowly on the stovetop with a splash of broth if it’s thickened after chilling.
• Extra flavor perks: try finishing with chopped fresh chives, cracked black pepper, a drizzle of quality olive oil, crispy shallots, toasted nuts, or sautéed mushrooms. For a non-vegetarian twist, a bit of crispy bacon really shines.
• Don’t toss those green leek tops! Freeze them in a bag and use later to add flavor to homemade vegetable stock.

Ways to Customize Your Soup

• Simply on its own! Thanks to the potatoes, this potato leek soup is filling, but feel free to jazz it up with fresh herbs, crispy shallots, or toasted nuts for an extra layer of flavor and texture.
• As a side soup. Pair it with a fresh, crisp salad to balance out your meal. Some of my favorites include a kale salad, shaved Brussels sprouts salad, or a classic Caesar salad.
• Make it an appetizer. If you’re hosting a dinner party, serve this soup in small bowls as a warm, inviting starter. It’s always a crowd-pleaser that feels fancy but is super easy.

Storage and Make-Ahead Tips

If you’re lucky enough to have leftovers (and trust me, you want leftovers), store any extra potato leek soup in a tightly sealed container in the fridge for up to 3 or 4 days.

For longer storage, freeze it for up to 3 months. When you’re ready to eat, reheat in the microwave for 2 to 3 minutes or gently on the stove with a splash of broth to loosen it up. Honestly, nothing beats having a cozy bowl of this soup ready on a busy day!

Frequently Asked Questions

• Can I substitute onions for leeks? Yes, onions are a good substitute but the flavor won’t be as delicate and sweet. Use one large yellow or sweet onion and sauté as you would the leeks.
• How do I properly clean leeks? Trim off the tough green tops and roots, then slice the white part lengthwise and separate the layers to rinse thoroughly under running water or soak in a bowl and swish around to remove dirt.
• What’s the best potato choice? Yukon Golds are perfect for creamy, buttery soup. Russets break down more and can be grainier, while waxy potatoes hold their shape better if you prefer some chunks in your soup.
• Is this recipe dairy-free or vegan? It’s naturally dairy-free and vegetarian. For vegan, stick to vegetable broth and skip any dairy toppings. Try stirring in some coconut milk or blended cashews for extra creaminess without dairy.
• Can I use chicken broth? Sure! It adds a richer flavor but makes the soup non-vegetarian. Use low-sodium broth and adjust salt accordingly.
• How long can I store leftovers? Keep in the fridge up to 4 days in a sealed container, or freeze up to 3 months.
• Can I make this in a slow cooker? Absolutely. Sauté leeks first, then add potatoes, herbs, and broth to your slow cooker. Cook on low for 4–6 hours or high for 2–3 hours until potatoes are soft, then blend.
• Any blending tips for hot soup? Immersion blenders are safest. If using a countertop blender, cool the soup slightly, fill the container halfway, vent the lid or remove center piece, and cover with a kitchen towel to avoid splatter.
• How do I adjust soup thickness? Thin it with extra broth or water or make it thicker by reducing broth, blending longer, or stirring in a bit of mashed potato.
• What’s the typical serving size? About 1 ¼ cups per serving, perfect for a light meal or starter.