Whisk together all ingredients in a large mixing bowl until well blended. Pour mixture into the freezer container of a 1 1/2-quart electric ice-cream maker, and freeze according to manufacturer's instructions. (Instructions and times will vary.) Cover and freeze until desired firmness.
Note: For testing purposes only, we used Stonyfield Farm Organic Whole Milk French Vanilla Yogurt and Nellie & Joe's Famous Key West Lime Juice.