1 1/2 c. buttermilk
1/2 of 6 oz. can (1/3 c.) frozen orange juice concentrate
2 tbsp. brown sugar
1 tsp. vanilla
2 or 3 lg. ice cubes

In a blender container, combine buttermilk, orange juice concentrate, brown sugar and vanilla. Cover and blend until smooth. With blender running, add ice cubes one at a time, through opening in lid. Blend until smooth and frothy.