How to Wash and Cut Leeks? (for Soups & more)
If you know me, you know that leeks are a staple in my kitchen! They’re flavorful, incredibly quick to prep, and surprisingly budget-friendly. In this article, I’ll show you how to wash and slice them like a chef, to make sure they are perfectly clean every time, with zero grit or sand in your teeth!
In this article
3 Tips for Choosing the Best Leeks
Before you reach for the knife, I have a few tips you to make sure you choose the best leeks at the farmer’s market!
- Freshness: Make sure that the leek stalk is nice and firm with no cracks. The leaves should be a vibrant deep green, this is the best sign of freshness!
- Summer vs. Winter: Did you know that leeks are in season all year round? Summer leeks tend to be slender and delicate in flavor, perfect for light salads or quiches. Winter leeks, on the other hand, are stronger and thicker, adding a wonderfully savory, hearty note to your stews and soups.
- Don’t waste anything: Don’t throw away those dark green tops! Even if they seem too firm for some recipes, they are absolute flavor gold for soups, stews, or a homemade vegetable stock. I often collect these leftovers in a “scrap bag” in the freezer so I always have some on hand when I need a flavor boost.
Step 1: Prepare the leek
Before you start washing, you’ll want to get your leeks prepped and ready:
- The roots: Start by carefully trimming off the root base at the bottom. Try to stay as close to the roots as possible—you don’t want to waste any of that delicious white part!
- The greenery: Next, trim off the very dark, fibrous tops. These are often a bit dry or tough for direct cooking, but as I mentioned before, they’re perfect for the freezer! 😉
- The outer layer: Take a quick look at the outermost layer of the stalk. If it looks particularly woody, fibrous, or bruised, just peel it off and discard it to reveal the tender leek underneath.
Step 2: Wash the Leeks
Leeks grow in sandy soil, and that grit loves to hide stubbornly between the individual layers. Here is the best way to get them clean:
- The lengthwise cut: Start by slicing the leek in half lengthwise, from the white base all the way through the green tops.
- The fanning technique: Hold the halves under cold running water. Use your fingers to carefully fan out the layers, pay extra attention to the area where the white part transitions into the green. This is exactly where most of the sand likes to hide!
- The final dry: Once clean, shake off the excess water well or pat the leeks dry with a clean kitchen towel so they’re ready for the pan.
My tip: If you want to leave the leek in one piece (see below), that’s no problem! As the white part is very tightly closed, no soil usually gets in there. Just cut deeply into the upper green part or loosen the leaves slightly and wash it well.
Step 3: 4 Ways to Cut Your Leeks
Now you are ready to slice the leek. Depending on what you want to cook, I choose one of these 4 variations:
- In long pieces: Ideal if you want to cook the leek for longer, for example in stews, such as in my classic French Veal Stew (blanquette de veau). Or if you want to eat the leek cold, as in the starter, Leeks with Vinaigrette.
- Halved pieces: I use this cutting technique for my Leek Tarte Tatin, for example. They cook faster and look really pretty on the plate.
- Wide rings: I usually use this variant when I’m looking for a beautiful look, in a quiche or simply braised in a pan as a side dish.
- Finely cut: This is the most commonly used technique! This is a great way to sauté the leeks. This is also the quickest way to cook them. You can find it in my vichyssoise, my Scallops au Gratin, my Salmon and Leek Quiche or as a base for the famous Finnish Salmon Soup.
Recipes with Leeks
Now that your leeks are perfectly prepared, here are some of my favorite recipes with leeks for you:
- Leek Tarte Tatin, a beautiful savory tart, cooked upside-down.
- Leek and Potato Soup
- Quiche with Leeks, Goat’s Cheese and Bacon
- Quiche with Salmon and Leeks (one of my favorite quiches!)
- Baked Salmon with Leeks (easy one-pan dinner)
- Leek with Vinaigrette, a classic of French bistro cuisine for a simple and healthy starter
FAQ- Leeks
Yes, absolutely! The sand often hides deep between the layers. Nothing spoils a fine meal more than a crunching sound when you take your first bite.
Yes, of course! In fact, it’s perfectly edible. The reason why it’s usually not used in most recipes is that it requires a longer cooking time because it’s very dry. However, some chefs fry it so it doesn’t go to waste, and of course it’s great for flavoring soups as well as homemade stocks and broths.
Leeks will keep for around one to two weeks in the vegetable drawer of your fridge. My tip: Wrap them unwashed in a damp kitchen towel or a reusable beeswax wrapper to keep them nice and crunchy.
Absolutely! You can already wash and cut the leek. Then dry them well and store them in an airtight container in the fridge. This will save you valuable time when cooking, perfect for a quick dinner after work.
Yes, that works wonderfully! It is best to cut it directly into rings or finely sliced. You don’t even have to blanch it. Just put it in a freezer bag and throw it straight into the pan or soup frozen when needed.
