By Pineknot
1 1/2 cups buttermilk
1/2 of a 6 oz can (1/3) frozen orange juice concentrate
2 tablespoons brown sugar
1 teaspoon vanilla
2 or 3 large ice cubes
In a blender container combine buttermilk, orange juice concentrate, brown sugar, and vanilla. Cover; blend until smooth. With blender running, add ice cubes, 1 at a time, through opening in lid. Blend until smooth and frothy.