Potato Soup · Potato Leek
Silky Potato Leek Soup
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Before you start
Gather your ingredients
Weights from USDA FoodData Central cup weights; counted things stay as counts.
Swaps for unsalted butter
Instead of butter
- Salted butter: The same amount, with about ¼ tsp less salt per stick (½ cup) elsewhere in the recipe. Nothing noticeable once you cut the salt.
- Plant-based butter sticks: The same amount. The closest swap.
- Refined coconut oil: The same amount: solid when the butter is soft or cold, melted when it is melted. It is all fat, so bakes are a bit more tender and rich, with no butter flavor.
Cooking for an allergy? Check every label.
Swaps for kosher salt
Instead of salt
- Table salt or fine sea salt: About half as much as Diamond Crystal kosher, about ¾ as much as Morton kosher. The same saltiness when measured this way.
- Salt by weight: 1 tsp is about 6 grams of table salt, 5 grams of Morton kosher, 3 grams of Diamond Crystal kosher. The most reliable way to swap, especially in baking and brines.
Swaps for garlic
Instead of garlic
- Garlic powder: ⅛ tsp for each clove. Mellower and sweeter, with no bite.
- Jarred minced garlic: ½ tsp for each clove. Milder and slightly sour from the preserving liquid.
Swaps for vegetable broth
Instead of broth
- Chicken broth: The same amount. Richer and more savory; not vegetarian.
- Bouillon cube, powder or paste + water: Follow the label for the amount of liquid. Close in flavor; a little saltier.
- Water + extra seasoning: The same amount, with ½ tsp salt per cup and extra garlic, onion or herbs. Flatter and lighter, but fine where other ingredients bring plenty of flavor.
Swaps for dried thyme
Instead of thyme
- Fresh thyme: 1 tbsp chopped fresh for each 1 tsp dried (three times as much). Brighter and more lemony.
- Italian seasoning or dried marjoram: The same amount. Close; Italian seasoning adds oregano and basil.
Swaps for kosher salt
Instead of salt
- Table salt or fine sea salt: About half as much as Diamond Crystal kosher, about ¾ as much as Morton kosher. The same saltiness when measured this way.
- Salt by weight: 1 tsp is about 6 grams of table salt, 5 grams of Morton kosher, 3 grams of Diamond Crystal kosher. The most reliable way to swap, especially in baking and brines.
Swaps for heavy cream
Instead of heavy cream
- Half-and-half: The same amount. Thinner and less rich.
- Milk + melted butter: ¾ cup whole milk + ¼ cup melted butter for each cup. Close in richness for cooking and baking, but it won't whip.
- Full-fat coconut milk: The same amount. Rich and silky with a coconut taste.
Cooking for an allergy? Check every label.
Swaps for fresh chives
Instead of chives
- Dried chives: 1 tsp dried for each 1 tbsp chopped fresh (a third as much). Freeze-dried chives keep color but little flavor; use them only as a garnish.
- Green onion tops: The same amount, sliced thin. Stronger and crunchier.
Step 1 of 11
Cut the dark green tops and the root ends off the leeks.
Step 2 of 11
Halve the leeks lengthwise, then them thinly crosswise.
slice (how to slice)
Slice Cut food into flat pieces of the same thickness. 1. Give round food a flat side to sit on.2. Hold it with your fingertips curled under.3. Cut with long strokes, pushing the knife forward and down rather than straight down.4. Move your guiding hand back the same distance each time so every slice matches. Done when: The slices are even. For meat, slicing across the grain (across the lines of muscle) gives the tenderest bite. Safety: Keep the fingertips of your guiding hand curled under, knuckles toward the blade, and set the board on a damp towel so it can't slide. Slice hot roasts on a board with a groove for the juices.How to slice evenly: mistakes to avoidStep 3 of 11
Put the sliced leeks in a big bowl of cold water and swish to loosen any grit. Lift them out into a colander so the grit stays in the bowl.
Step 4 of 11
Melt the butter in a Dutch oven over medium-low heat. Add the leeks and a pinch of salt and cook, stirring often, until very soft but not browned.
Step 5 of 11
Add the garlic and stir until fragrant.
Step 6 of 11
Add the potatoes, broth, bay leaf, thyme, salt and pepper and bring to a .
boil (how to boil)
Boil Heat liquid until big bubbles rise and break all over the surface. 1. Use a pot big enough that the water fills it no more than three quarters.2. Cover it to boil faster, over high heat.3. Salt pasta or vegetable water once it boils.4. Add the food, stir, and bring it back to a boil before you start timing. Done when: A rolling boil keeps bubbling hard even when you stir. Safety: Turn pot handles toward the back of the stove, and drain pasta into a colander in the sink, pouring away from you. Steam burns fast: lift lids and foil away from your face, tipping the far edge up first.How to boil water for pasta and vegetables: mistakes to avoidStep 7 of 11
Lower the heat and until the potatoes are very tender.
simmer (how to simmer)
Simmer Cook liquid just below a boil, with small bubbles breaking the surface now and then. 1. Bring the liquid up over medium-high heat.2. As soon as bubbles rise steadily, turn the heat down.3. Adjust until only a few small bubbles break the surface every second or two.4. Stir now and then and check that it hasn't crept back to a boil. Done when: You see lazy, small bubbles, not a rolling boil. A "bare" simmer has just a bubble here and there. Safety: Steam burns fast: lift lids and foil away from your face, tipping the far edge up first.How to simmer: mistakes to avoidStep 8 of 11
Remove the bay leaf.
Step 9 of 11
Blend with an immersion blender in short bursts until smooth. Blending too long can make potatoes gluey.
Step 10 of 11
Stir in the cream and warm through without .
boiling (how to boil)
Boil Heat liquid until big bubbles rise and break all over the surface. 1. Use a pot big enough that the water fills it no more than three quarters.2. Cover it to boil faster, over high heat.3. Salt pasta or vegetable water once it boils.4. Add the food, stir, and bring it back to a boil before you start timing. Done when: A rolling boil keeps bubbling hard even when you stir. Safety: Turn pot handles toward the back of the stove, and drain pasta into a colander in the sink, pouring away from you. Steam burns fast: lift lids and foil away from your face, tipping the far edge up first.How to boil water for pasta and vegetables: mistakes to avoidStep 11 of 11
Taste for salt and serve topped with chives.
All done
Enjoy!
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