Creamy Instant Pot potato leek soup is warm, smooth, and comforting, with tender leeks, soft potatoes, fresh herbs, and a rich splash of cream. It is a cozy soup that tastes slow-simmered but comes together quickly, making it perfect for chilly evenings, simple lunches, or a light dinner with crisp crostini on the side.
Why You’ll Love This Recipe
This recipe is quick, creamy, and full of gentle savory flavor. The Instant Pot softens the potatoes and leeks fast, so you get a velvety soup without spending hours at the stove. The leeks add a mild onion-like sweetness, the potatoes make the texture naturally thick, and the thyme gives the soup a fresh, earthy finish.
You will also love the crostini topping. The creamy goat cheese, sweet peas, lemon, and chives add brightness that balances the rich soup beautifully. It feels elegant enough for guests but easy enough for a weeknight meal.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
For the soup:
3 tablespoons salted butter
3 large leeks, white and light green parts only, thinly sliced and rinsed well
2 celery stalks, chopped
2 teaspoons kosher salt
1/2 teaspoon black pepper, plus more to taste
3 garlic cloves, chopped
6 cups vegetable broth
6 fresh thyme sprigs, plus extra thyme leaves for topping
4 medium russet potatoes, about 2 1/2 pounds, peeled and quartered
1 bay leaf
1 cup heavy cream, plus extra for drizzling
For the crostini:
1 cup frozen peas, thawed
4 ounces goat cheese, softened to room temperature
1 teaspoon grated lemon zest
1 tablespoon fresh lemon juice
1 tablespoon chopped fresh chives
1/4 teaspoon kosher salt
1/4 teaspoon black pepper
12 baguette slices, toasted
Directions
Set a 6- to 8-quart Instant Pot to sauté on high. Add the salted butter and let it melt fully. Add the sliced leeks, chopped celery, kosher salt, and black pepper. Cook for 4 to 6 minutes, stirring often, until the vegetables soften and the leeks become fragrant.
Stir in the chopped garlic and cook for about 1 minute, just until aromatic. Add the vegetable broth, thyme sprigs, quartered potatoes, and bay leaf. Stir gently to combine.
Lock the lid in place and make sure the steam valve is set to sealing. Cook on high pressure for 10 minutes. When the cooking time ends, carefully turn the valve to venting using a kitchen towel to protect your hand. Let the steam release completely before opening the lid.
Remove the thyme sprigs and bay leaf. Let the soup cool slightly, then blend with an immersion blender until completely smooth. For a silkier texture, blend a little longer. Stir in the heavy cream and taste. Add more black pepper or a small pinch of salt if needed.
For the crostini, place the thawed peas in a medium bowl and mash them with a fork. Add the softened goat cheese, lemon zest, lemon juice, chives, kosher salt, and black pepper. Mash until creamy but still slightly textured. Spread the mixture over toasted baguette slices.
Ladle the soup into bowls. Drizzle with a little heavy cream, sprinkle with thyme leaves and black pepper, and serve with the goat cheese pea crostini.
Servings and timing
This recipe makes 4 to 6 servings.
Prep time: 30 minutes
Cook time: 10 minutes under pressure, plus sautéing and pressure release
Total time: about 30 minutes
Variations
For a lighter soup, replace half of the heavy cream with milk or use a smaller amount of cream. For a thicker soup, add one extra potato before pressure cooking. For a brighter flavor, stir in a small squeeze of lemon juice after blending.
You can also skip the crostini and serve the soup with toasted bread, crackers, or a simple green salad. For a dairy-free version, use olive oil instead of butter, coconut cream or unsweetened plant cream instead of heavy cream, and omit the goat cheese topping.
Storage/Reheating
Store leftover soup in an airtight container in the refrigerator for up to 4 days. Let it cool before covering and chilling.
Reheat gently on the stovetop over medium-low heat, stirring often, until warm. You can also microwave individual portions in short intervals, stirring between each one. If the soup thickens in the refrigerator, add a splash of vegetable broth or water while reheating.
Store the crostini topping separately from the bread. Toasted baguette is best assembled right before serving so it stays crisp.
FAQs
Can I make this soup without an Instant Pot?
Yes. Cook the leeks, celery, and garlic in a large pot, then add the broth, potatoes, thyme, and bay leaf. Simmer until the potatoes are very tender, then blend and add cream.
Do I have to peel the potatoes?
Peeling gives the soup a smoother texture, but you can leave the skins on if you prefer a more rustic finish.
What part of the leek should I use?
Use the white and light green parts. The dark green tops are tougher and stronger in flavor.
How do I clean leeks properly?
Slice them first, then rinse well in a bowl of water or under running water to remove dirt between the layers.
Can I freeze potato leek soup?
Yes, but cream-based soups can change texture after freezing. Freeze before adding cream for best results, then stir in cream after reheating.
Can I use chicken broth instead of vegetable broth?
Yes, chicken broth works well, but vegetable broth keeps the recipe suitable for a meat-free meal.
How can I make the soup extra smooth?
Blend thoroughly with an immersion blender, or carefully blend in batches using a regular blender.
Can I skip the crostini?
Yes. The soup is delicious on its own, though the crostini adds freshness and texture.
What can I use instead of goat cheese?
Cream cheese, ricotta, or a mild soft cheese can work as a substitute.
Why is my soup too thick?
Potatoes naturally thicken the soup. Stir in extra broth, water, or cream until it reaches your preferred consistency.
Conclusion
Instant Pot potato leek soup is simple, creamy, and deeply comforting. With tender potatoes, mild leeks, fresh thyme, and a bright goat cheese pea crostini, it has both cozy flavor and a fresh finishing touch. It is an easy recipe to make for family dinners, meal prep, or any day when you want a warm bowl of homemade soup.
Creamy Instant Pot potato leek soup made with tender potatoes, sweet leeks, fresh thyme, and rich cream, served with flavorful goat cheese pea crostini.
Ingredients
3 tablespoons salted butter
3 large leeks, white and light green parts only, thinly sliced and rinsed well
2 celery stalks, chopped
2 teaspoons kosher salt
1/2 teaspoon black pepper, plus more to taste
3 garlic cloves, chopped
6 cups vegetable broth
6 fresh thyme sprigs, plus extra thyme leaves for topping
4 medium russet potatoes, about 2 1/2 pounds, peeled and quartered
1 bay leaf
1 cup heavy cream, plus extra for drizzling
1 cup frozen peas, thawed
4 ounces goat cheese, softened
1 teaspoon grated lemon zest
1 tablespoon fresh lemon juice
1 tablespoon chopped fresh chives
1/4 teaspoon kosher salt
1/4 teaspoon black pepper
12 baguette slices, toasted
Instructions
Set a 6- to 8-quart Instant Pot to sauté on high. Melt the butter completely.
Add the sliced leeks, chopped celery, kosher salt, and black pepper. Cook for 4 to 6 minutes, stirring often, until softened.
Stir in the chopped garlic and cook for about 1 minute until fragrant.
Add the vegetable broth, thyme sprigs, quartered potatoes, and bay leaf. Stir gently to combine.
Lock the lid and set the steam valve to sealing. Cook on high pressure for 10 minutes.
Carefully quick release the pressure using a kitchen towel for protection, then open the lid.
Remove the thyme sprigs and bay leaf. Blend the soup with an immersion blender until smooth.
Stir in the heavy cream and adjust seasoning with additional salt or pepper if needed.
For the crostini, mash the thawed peas in a bowl with a fork.
Add the goat cheese, lemon zest, lemon juice, chives, kosher salt, and black pepper. Mix until creamy but slightly textured.
Spread the pea and goat cheese mixture onto the toasted baguette slices.
Ladle the soup into bowls, drizzle with extra cream, garnish with thyme leaves and black pepper, and serve with the crostini.
Notes
Rinse leeks thoroughly after slicing to remove hidden dirt.
Blend longer for an extra silky smooth soup texture.
For a lighter version, replace part of the cream with milk.
Freeze the soup before adding cream for best texture after thawing.
Store crostini topping separately from the bread to keep it crisp.
