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.