Creamy Potato Leek Soup – Easy 50-Minute Comfort

Imagine a bowl of velvet: sweet leeks melting into soft, floury potatoes, a swirl of cream catching the light, and that first spoonful tasting like a warm blanket on a cold evening. Potato leek soup is humble comfort food at its finest, and it needs almost nothing to shine.

The secret is patience with the leeks. When you let them sweat slowly in butter until they go translucent and jammy, their sharp onion edge turns into something almost sugary, and the whole pot follows suit. The potatoes do the rest, thickening the broth naturally so you barely need cream at all.

I keep this recipe simple on purpose: a handful of pantry staples, one pot, and a blender or immersion blender. It freezes beautifully, reheats like a dream, and tastes even better the next day, which is exactly what you want from a soup you will make all winter long.

About the Ingredients

3 tablespoons (42g) unsalted butter

Butter gives the leeks their sweet, rounded flavor. Swap in olive oil for a dairy-free version, or use ghee for a nuttier note.

3 large leeks (about 1 1/2 pounds / 680g), white and light green parts only

Look for firm, tight stalks with bright green tops; skip any that feel slimy at the base. If leeks are scarce, two large yellow onions plus one bunch of scallions make a fine stand-in.

2 medium garlic cloves, minced

Fresh garlic is best, but 1/2 teaspoon garlic powder works in a pinch. Add it late so it does not scorch.

2 1/2 pounds (1.1kg) Yukon Gold potatoes, peeled and cut into 1-inch chunks

Yukon Golds turn creamy without going gluey. Russets work too but yield a fluffier, thicker soup; avoid waxy red potatoes, which stay chunky.

6 cups (1.4L) low-sodium chicken or vegetable broth

Use vegetable broth to keep it vegetarian. If using salted broth, taste before adding extra salt at the end.

1 cup (240ml) whole milk

Whole milk keeps it rich; swap in half-and-half for extra luxury or unsweetened oat milk for dairy-free. Add it off the heat so it does not curdle.

1/2 cup (120ml) heavy cream

A finishing swirl of cream makes it restaurant-silky. Crème fraîche or full-fat coconut cream are lovely substitutes.

1 1/2 teaspoons kosher salt, plus more to taste

Kosher salt dissolves evenly and seasons gently. If using fine table salt, start with 1 teaspoon.

1/2 teaspoon freshly ground black pepper

Freshly cracked pepper blooms in the warm soup. White pepper is a classic French choice for a cleaner look.

2 tablespoons chopped fresh chives, for serving

Chives add a bright oniony pop. Thinly sliced scallion greens or a pinch of fresh thyme are easy swaps.

Tips & Tricks

Wash leeks like a pro

Slice them first, then swish the rings in a bowl of cold water and lift them out, leaving the grit behind.

Do not brown the leeks

Keep the heat low and stir often; golden-brown leeks turn the soup bitter and gray.

Blend in batches and vent the lid

Hot soup expands fast in a blender, so fill it halfway and crack the lid for steam.

Season at the end

Potatoes absorb salt as they cook, so taste and adjust after blending, not before.

Step-by-Step Instructions

1. Sweat the leeks

Melt the butter in a Dutch oven over medium-low heat (about 300°F / 150°C) and add the sliced leeks with a pinch of salt. Cook for 10 to 12 minutes, stirring often, until they are soft, translucent, and smell sweet rather than sharp.

2. Bloom the garlic

Stir in the garlic and cook for 60 seconds, just until fragrant; it should smell toasty, not browned. This keeps the garlic mellow instead of bitter.

3. Simmer the potatoes

Add the potatoes, broth, 1 1/2 teaspoons salt, and pepper, and bring to a gentle boil over medium-high heat (about 375°F / 190°C). Reduce to a simmer and cook for 18 to 20 minutes, until a knife slides into a potato chunk with no resistance.

4. Blend until silky

Take the pot off the heat and blend with an immersion blender, or transfer in batches to a stand blender, until completely smooth, about 1 to 2 minutes. The soup should look glossy and pour like heavy cream.

5. Finish with dairy

Return the soup to low heat (about 200°F / 95°C) and stir in the milk and cream. Warm for 3 to 4 minutes until steaming at the edges but not bubbling, so the dairy stays smooth.

6. Taste and season

Taste carefully and add salt and pepper until the leek sweetness sings. Ladle into bowls and shower with chives before serving hot.

Delicious Variations

Bacon and Cheddar

Crisp 4 slices of bacon, use the drippings instead of butter, and stir in 1 cup of sharp cheddar at the end.

Roasted Garlic and Thyme

Roast a whole head of garlic, squeeze the cloves into the pot, and add 1 teaspoon of fresh thyme with the broth.

Vichyssoise Style

Chill the finished soup overnight and serve cold with an extra swirl of cream and a sprinkle of chives.

How to Store Potato Leek Soup

Frequently Asked Questions

Ladle it into your favorite bowl, top it with a tangle of chives, and maybe tear off a hunk of crusty bread for dunking. Taste as you go, trust your tongue.

Potato Leek Soup

This Potato Leek Soup is silky, buttery, and deeply comforting, made with sweet leeks and tender potatoes for a cozy bowl in under an hour.

★★★★½ 4.8 (214 ratings)

15 minPrep time35 minCook time6Servings285 kcalCalories

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🧂 Ingredients

• 3 tablespoons (42g) unsalted butter
• 3 large leeks (about 1 1/2 pounds / 680g), white and light green parts only
• 2 medium garlic cloves, minced
• 2 1/2 pounds (1.1kg) Yukon Gold potatoes, peeled and cut into 1-inch chunks
• 6 cups (1.4L) low-sodium chicken or vegetable broth
• 1 cup (240ml) whole milk
• 1/2 cup (120ml) heavy cream
• 1 1/2 teaspoons kosher salt, plus more to taste
• 1/2 teaspoon freshly ground black pepper
• 2 tablespoons chopped fresh chives, for serving

📋 Instructions

1. 1Sweat the leeks — Melt the butter in a Dutch oven over medium-low heat (about 300°F / 150°C) and add the sliced leeks with a pinch of salt. Cook for 10 to 12 minutes, stirring often, until they are soft, translucent, and smell sweet rather than sharp.
2. 2Bloom the garlic — Stir in the garlic and cook for 60 seconds, just until fragrant; it should smell toasty, not browned. This keeps the garlic mellow instead of bitter.
3. 3Simmer the potatoes — Add the potatoes, broth, 1 1/2 teaspoons salt, and pepper, and bring to a gentle boil over medium-high heat (about 375°F / 190°C). Reduce to a simmer and cook for 18 to 20 minutes, until a knife slides into a potato chunk with no resistance.
4. 4Blend until silky — Take the pot off the heat and blend with an immersion blender, or transfer in batches to a stand blender, until completely smooth, about 1 to 2 minutes. The soup should look glossy and pour like heavy cream.
5. 5Finish with dairy — Return the soup to low heat (about 200°F / 95°C) and stir in the milk and cream. Warm for 3 to 4 minutes until steaming at the edges but not bubbling, so the dairy stays smooth.
6. 6Taste and season — Taste carefully and add salt and pepper until the leek sweetness sings. Ladle into bowls and shower with chives before serving hot.

👨‍🍳 Chef's Note: If you have a parmesan rind hiding in the fridge, simmer it with the potatoes for a quietly luxurious depth; just remember to fish it out before blending.

Servings: 6

Cuisine: French

Course: Soup

Nutrition (per serving): 285 kcal · 7g protein · 34g carbs · 13g fat

Written by Priya Raman

Priya writes about cooking for busy people who want food that tastes like effort was made. Her angle is building flavor with few ingredients and forgiving techniques that survive a rushed weeknight. She writes about substitutions freely and treats recipes as starting points rather than rules.