Potato Leek Soup

This potato leek soup is inspired by my time in Paris and it’s genuinely one of my favorite soups ever. I ordered some version of it again and again while I was there, and every bowl reminded me how special simple food can be when it’s done well. Smooth, comforting, and timeless, this is a soup I could eat on repeat and never get tired of.

After living in Paris for a few weeks, I kept seeing Parisians carrying leeks in their purses and backpacks on the way home from work and it made me crave the soup. Potato leek soup is incredible because it doesn’t rely on bold spices or heavy ingredients. It’s all about technique, patience, and layering flavor slowly. When you take the time to soften the leeks properly and season in stages, the result is something quietly luxurious and incredibly cozy.

This is my at-home version of a soup I really fell in love with. Classic, comforting, and exactly what I want simmering on the stove on a cold day.

Why You’ll Love This Soup

• Inspired by classic French version
• Smooth, creamy, and comforting without being heavy
• Simple ingredients that really shine
• Easy to make but feels elevated
• Perfect for cozy nights and leftovers
• Pairs insanely well with a grilled cheese

How to Make Potato Leek Soup

Start by adding the butter to a large pot over medium heat and letting it melt completely. Saute the garlic for a minute or two. I like to brown the butter for more flavor but that’s completely optional. Add the leeks right away, season lightly with salt and black pepper, and cook slowly, stirring often, until the leeks are soft and translucent. You don’t want any browning here, just gentle cooking to bring out their natural sweetness.

Once the leeks are soft, add the thyme leaves and cook for about a minute until fragrant. Season lightly again to build flavor in layers, which makes a big difference in a soup this simple.

Add the cubed potatoes, water, and vegetable stock cubes to the pot. I like to leave the skins on Yukon Gold potatoes because they’re thin, blend smoothly, and add extra flavor and body to the soup. Bring everything to a boil, then reduce to a gentle simmer and cook for about 15 to 20 minutes, until the potatoes are very tender and easily pierced with a fork.

Remove the pot from the heat and blend the soup until completely smooth using an immersion blender or a regular blender. If the soup feels too thick, add more water a little at a time until you reach your preferred texture.

For an extra-smooth, restaurant-style finish, you can strain the soup through a fine-mesh sieve and return it to the pot. This step is optional, but it gives you that ultra-silky texture you’d expect from a French bistro.

Set the pot back over low heat and stir in the heavy cream and crème fraîche until fully incorporated. Finish with a squeeze of lemon juice and a dash of nutmeg, then taste and adjust with more salt and black pepper as needed.

Tips for the Best Texture

• Cook the leeks low and slow to avoid bitterness
• Season in layers instead of all at once
• Blend thoroughly for the smoothest result
• Add liquid gradually so you stay in control of the consistency

Variations & Garnishes (How to Do Each One)

Add shallots for more depth
Along with the leeks, add one or two finely chopped shallots when the butter melts. This is a very common addition and enhances that soft leek-onion flavor without overpowering the soup.

Ultra-smooth, French bistro style
After blending, strain the soup through a fine-mesh sieve, pressing gently with a spoon. This extra step removes any remaining texture and makes the soup incredibly silky.

Extra rich and creamy
Increase the crème fraîche slightly or finish each bowl with an extra spoonful on top. It makes the soup feel especially luxurious.

Fried garlic or fried shallots (for crunch)
Thinly slice garlic or shallots and add them to a small pan with a shallow layer of oil over medium-low heat. Cook slowly, stirring often, until lightly golden and crisp, then transfer to a paper towel to drain. Sprinkle over the soup just before serving for the best texture.

Leek- or chive-infused oil
Warm olive oil gently over low heat with chopped leeks or chives until fragrant, about 10 to 15 minutes. Remove from heat, let it steep, then strain. Drizzle over the soup right before serving for a subtle oniony flavor and an elevated finish.

Crouton garnish
Toast some small cubes of bread in olive oil, salt, and pepper until crispy and golden all around to make homemade croutons and add on top of the soup for a crunchy texture.

Serving & Making Ahead

This soup is perfect for making ahead and actually gets better as it sits. Store it in the fridge and reheat gently on the stove, adding a splash of water/broth or cream if needed to loosen it back up. Serve with crusty bread and enjoy.

Craving More Soup? Try These Recipes Out!

If soup season is always on repeat for you too, here are a few favorites to save:

• Lasagna Soup: All the flavors of classic lasagna made in one pot, with no layering required.
• Brothy Rice & Chicken: Sweet and savory with a little spice, this cozy soup tastes just like buldak carbonara ramen.
• Tortellini Soup: A cozy, one-pot Italian-inspired soup with tender tortellini and savory broth that feels like a warm hug in a bowl.
• Broccoli Cheddar Soup: A creamy, cheesy Panera copycat packed with tender broccoli and classic comfort flavor.
• Chicken Gnocchi Soup: A creamy, cozy Olive Garden copycat made with tender chicken and pillowy gnocchi.
• Red Curry Dumpling Soup: The best Thai flavors in a warm, comforting bowl and my favorite soup to make when I’m feeling sick.

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