You can eat the butter now -- it has a light taste -- though it will store better if you wash and work it. Add 1/2 cup (100 mL) of ice-cold water, and blend further. Discard wash water and repeat until the wash water is clear. Now, work butter to remove suspended water. Either place damp butter into a cool bowl and knead with a potato masher or two forks; or put in large covered jar, and shake or tumble. Continue working, pouring out the water occasionally, until most of the water is removed. The butter is now ready. Put butter in a butter crock, ramekins, or roll in waxy freezer paper.