Combine butter and remaining ingredients, and salt if desired. Mix well. Transfer mixture to a condiment bowl and cover with plastic wrap. Refrigerate until ready to use. Allow the butter to come to room temperature to use.
Or roll into a log about 1 and ½-inch thick. Twist the ends to close. Refrigerate for at least one hour or until firm. Remove from refrigerator and slice into ½- inch ‘coins’ when ready to use.