A small (6- to 7-inch-long) utensil with a serrated hook at one end. The hook is drawn down the length of a stick of butter to make butter curls. The curls are then dropped into ice water to set their shape.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.