soy sour cream
A lactose-free product made from soy milk treated with a souring agent. It has a consistency and cooking properties similar to that of dairy sour cream and may be substituted in equal quantities for it. Soy sour cream can be found in natural food stores as well as some supermarkets (look in the kosher or gourmet cheese areas). It must be refrigerated and should be used within a week of purchase.
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.