Shake the fresh herbs to remove dirt and grit. If the herbs are badly soiled, or if pesticides or herbicides have been used near your herb garden, rinse the herbs in cool water.
Fill a large saucepan with water. Bring the water to a full boil.
Hold a bunch of the herbs with tongs. Dip the herbs in the boiling water until they turn bright green, usually no more than 45 to 50 seconds
Cool the the blanched herbs quickly by dipping them in a bowl of ice water. Alternatively, place the blanched herbs on a layer of paper towels, and allow them to air-dry.