Allow the chimichurri sauce to cool completely to room temperature.
Pour the sauce into ice cube trays or small freezer-safe containers, leaving some headspace for expansion.
Cover the ice cube trays with plastic wrap or seal the containers with tight-fitting lids.
Label the containers or trays with the date and contents.
Place the trays or containers in the freezer and freeze until solid (usually 2-3 hours).
Once frozen, remove the chimichurri cubes from the ice cube trays and transfer them to a freezer-safe bag or container.
Remove as much air as possible from the bag or container before sealing to prevent freezer burn.
Store the chimichurri sauce in the freezer for up to 6 months.
To use, simply remove the desired number of cubes and thaw in the refrigerator or at room temperature.
Give the thawed chimichurri sauce a good stir before using, as some separation may occur during freezing and thawing.