To freeze cilantro, carefully wash and rinse the sprigs. Once the sprigs have been rinsed, pat them dry with a paper towel, put them into a small freezer bag, and then place the bag into the freezer.
An alternative way to freeze cilantro requires chopping it and placing it into an ice cube tray. Once you've portioned out the leaves, fill the tray the rest of the way with water, and place it into the freezer. Freezing cilantro using this method allows you to easily defrost the precise amount of cilantro your recipe calls for without having to throw any away.