In The Kitchen Cooking Tips & Techniques

How to Clean Leeks

How to Clean Leeks, it's easy! Here are instructions on how to clean leeks 2 ways — chopped for soup and for whole leeks.

How to Clean Leeks
Elise Bauer

Consider the leek.

It's majestic, a titan in the onion family.

Mostly just the white and light green parts are eaten, though the darker green parts have plenty of flavor and can either be cooked longer to tenderize them, or used when making homemade soup stock.

Leeks Are Dirty

The challenge when cooking with leeks is that they are almost always dirty. When leeks are grown, soil is piled up around them, so that more of the leek is hidden from the sun, and therefore lighter in color and more tender.

What produces a beautiful leek, a long pale body, also results in sand and dirt being lodged deep inside the leek.

Two Ways to Clean Leeks

There are basically two ways to clean leeks, the method you use depends upon how you are going to use the leeks in cooking. The easiest way is to prepare them chopped for use in soup.

A little more challenging is preparing a leek for use in a recipe that requires whole leeks. Both methods are detailed here.

Have Leeks? Here Are Some Great Recipes to Use Them With:

How to Clean Leeks

Prep Time 10 mins
Total Time 10 mins
Servings 2 to 12 servings
Yield 1 to 6 cleaned leeks

Choose leeks that are about an inch thick, and have a long white to pale green shaft. The pale parts are the most useable.

Ingredients

  • Fresh leeks

Method

Rinse the leeks

Before getting started with either method, rinse the leeks under water to remove visible dirt or sand.

several long fresh leeks before cleaning them
Elise Bauer
leeks are dirty
Elise Bauer

Preparing leeks for soup

  1. Cut off the roots of the leeks. Slice the leeks lengthwise.
    Best Potato Leek Soup slice the leeks lengthwise
    Elise Bauer
    slice leeks crosswise to prepare leeks for soup
    Elise Bauer
  2. Make crosswise cuts:

    Decide how much of the leek greens you want to use. They are tougher and can be stronger tasting, but soften with long cooking.

    The last couple of inches of the dark green ends should probably be discarded or saved for making stock. (I put mine in a plastic bag and drop it in the freezer.)

    Make crosswise cuts along the parts of the leek that you intend to use.

  3. Rinse in a bowl of cold water:

    Place the chopped leeks into a bowl and fill with cold water. (If the leeks are especially dirty, rinse them first in a colander, before covering with water.) Use your hands to agitate the leeks and dislodge any dirt or sand that may be clinging to them.

    rinse leek slices under running water to clean the leeks
    Elise Bauer
    sliced leeks, rinsed and drained
    Elise Bauer

    Scoop the leeks out of the water with a sieve or slotted spoon and place in a new bowl.

Cleaning and Prepping Whole Leeks

  1. Cut from opening to ends of greens:

    Place leek on a cutting board. Insert the tip of a sharp knife about a 1/4-inch below the lowest opening in the leek.

    Cut straight through, up to and through the green ends of the leek, leaving the pale part of the leek whole.

    best way to clean leeks
    Elise Bauer
    easy way to clean leeks
    Elise Bauer
  2. Rinse:

    Fan open the leek and place under cold running water. Rinse out any dirt or sand. If the leek is especially dirty, you may want to make another similar cut through the leek to further be able to fan the leek open.

    rinse cut leek under running water to remove dirt from the leek
    Elise Bauer
  3. Cut off dark green tops:

    Cut off the dark green tops of the leek, reserving on the body of the leek as much of the dark green as you want. We like the taste (it's basically just a big onion green), so we typically keep about 2 to 3 inches or so of the dark green part with the body of the leeks.

    cut off the top green parts of the leeks to prep the leeks
    Elise Bauer

    Discard the dark greens or save them to flavor soups or stews, or use for making stock.

  4. Cut of the root end of the leeks:

    Stay as close to the roots as possible. Cutting close to the roots will hold the leeks together when cooking them whole.

    cut the root end off the leek before cleaning the leek
    Elise Bauer

Links:

How to prepare leeks by David Lebovitz

How to Clean Leeks
Elise Bauer