Ingredients
Equipment
Method
Prepare The Potatoes
- Cut the potatoes into uniform 1/2-inch cubes. Place them in a mixing bowl and cover with water. Set aside.
Sauté The Leeks & Aromatics
- Melt the butter in a large Dutch oven or heavy-bottomed pot over medium heat until shimmering. Add the cleaned and sliced leeks, minced shallots, and sliced garlic. Season generously with salt and pepper. Cook, stirring occasionally, until the vegetables are very soft and translucent, about 8-10 minutes. Do not allow them to brown.
Add Potatoes and Simmer
- Drain the potatoes, reserving their soaking water. Add the diced potatoes to the pot with the sautéed leeks and shallots. Tuck in the bay leaf, thyme sprigs, and optional parsley bunch. Pour in the broth, adding more broth or water if needed, ensuring the vegetables are just barely submerged. Increase heat to high and bring to a rolling boil. Immediately reduce heat to low, cover, and simmer gently until potatoes are very tender, approximately 25 to 35 minutes.
Puree The Potato Leek Soup
- Remove and discard the bay leaf and herb stems. Stir in 2 cups of the reserved potato soaking water. Using an immersion blender, carefully puree the soup until it reaches your desired consistency.
Finish The Soup
- Taste the soup and season generously with salt and freshly ground black pepper. Simmer for an additional 5 to 10 minutes to allow flavors to meld and the soup to thicken slightly.
Serve The Soup
- Ladle the hot soup into bowls. Garnish as desired with a drizzle of heavy cream, a sprinkle of freshly grated nutmeg, a scattering of snipped fresh chives, and a handful of crunchy croutons.
Notes
Ingredient Notes & Substitutions
Potatoes: Yukon Gold potatoes are prized for their buttery flavor and creamy texture when cooked, making them ideal for this soup. Red Bliss or new potatoes will also work, offering a slightly firmer texture.
Broth: Low-sodium chicken or vegetable broth provides a good base. Using beef broth can add a deeper, richer flavor profile.
Leeks: Ensure leeks are thoroughly cleaned to remove any hidden grit. Substitute with the white and light green parts of green onions in a pinch, though the flavor will be less complex.
Cream: Heavy cream or crème fraîche adds richness. For a dairy-free or vegan version, use full-fat coconut milk or a plant-based creamer, or omit entirely. Pro Tips & Troubleshooting
Clean Leeks Thoroughly: Slice leeks lengthwise and fan out the layers under cool running water, or soak them in a bowl of water and lift them out, leaving any trapped sand or dirt behind.
Herb Bouquet: Tie fresh herbs (thyme, parsley) together with kitchen twine for easy removal before blending.
Achieve Perfect Smoothness: For an ultra-smooth soup, pass the pureed mixture through a fine-mesh sieve.
Taste and Adjust Seasoning: Always taste and adjust salt and pepper at the end of cooking, as broth and other ingredients can vary in saltiness.
Enhance Flavor: Consider adding a splash of dry white wine after sautéing the leeks and shallots, letting it reduce before adding potatoes and broth. Common Mistakes to Avoid
Browning the Aromatics: Sauté leeks and shallots gently until tender, not browned, to maintain a delicate flavor and pale color.
Over-Salting Early: Hold off on heavy salting until the end; broth can be salty, and flavors concentrate as the soup simmers.
Undercooked Potatoes: Ensure potatoes are completely tender before blending. They should practically dissolve when poked.
Watery Soup: Use the correct liquid-to-solid ratio. The reserved potato water adds thickness; don't use too much extra broth or water.
Forgetting to Remove Herbs: Always remove bay leaves and herb stems before blending to avoid an unpleasant texture or overpowering flavor. Storage and Make-Ahead
Refrigeration: Allow the soup to cool completely. Store in an airtight container in the refrigerator for up to 3-4 days. The flavors often improve overnight.
Freezing: While possible, freezing can sometimes alter the texture of creamy soups. If freezing, cool completely, store in freezer-safe containers, and use within 1-2 months. Thaw in the refrigerator overnight.
Reheating: Gently reheat on the stovetop over low heat, stirring occasionally. Do not boil. If the soup has thickened considerably, add a splash of broth or water to reach your desired consistency.
Potatoes: Yukon Gold potatoes are prized for their buttery flavor and creamy texture when cooked, making them ideal for this soup. Red Bliss or new potatoes will also work, offering a slightly firmer texture.
Broth: Low-sodium chicken or vegetable broth provides a good base. Using beef broth can add a deeper, richer flavor profile.
Leeks: Ensure leeks are thoroughly cleaned to remove any hidden grit. Substitute with the white and light green parts of green onions in a pinch, though the flavor will be less complex.
Cream: Heavy cream or crème fraîche adds richness. For a dairy-free or vegan version, use full-fat coconut milk or a plant-based creamer, or omit entirely. Pro Tips & Troubleshooting
Clean Leeks Thoroughly: Slice leeks lengthwise and fan out the layers under cool running water, or soak them in a bowl of water and lift them out, leaving any trapped sand or dirt behind.
Herb Bouquet: Tie fresh herbs (thyme, parsley) together with kitchen twine for easy removal before blending.
Achieve Perfect Smoothness: For an ultra-smooth soup, pass the pureed mixture through a fine-mesh sieve.
Taste and Adjust Seasoning: Always taste and adjust salt and pepper at the end of cooking, as broth and other ingredients can vary in saltiness.
Enhance Flavor: Consider adding a splash of dry white wine after sautéing the leeks and shallots, letting it reduce before adding potatoes and broth. Common Mistakes to Avoid
Browning the Aromatics: Sauté leeks and shallots gently until tender, not browned, to maintain a delicate flavor and pale color.
Over-Salting Early: Hold off on heavy salting until the end; broth can be salty, and flavors concentrate as the soup simmers.
Undercooked Potatoes: Ensure potatoes are completely tender before blending. They should practically dissolve when poked.
Watery Soup: Use the correct liquid-to-solid ratio. The reserved potato water adds thickness; don't use too much extra broth or water.
Forgetting to Remove Herbs: Always remove bay leaves and herb stems before blending to avoid an unpleasant texture or overpowering flavor. Storage and Make-Ahead
Refrigeration: Allow the soup to cool completely. Store in an airtight container in the refrigerator for up to 3-4 days. The flavors often improve overnight.
Freezing: While possible, freezing can sometimes alter the texture of creamy soups. If freezing, cool completely, store in freezer-safe containers, and use within 1-2 months. Thaw in the refrigerator overnight.
Reheating: Gently reheat on the stovetop over low heat, stirring occasionally. Do not boil. If the soup has thickened considerably, add a splash of broth or water to reach your desired consistency.