2/3 c. (6-ounces) frozen orange juice concentrate
1/3 c. sugar
1 c. water
1 t. vanilla
1 cup half & half (you can use milk instead)
about 20 large ice cubes
Put all of the above ingredients in a blender, except the ice cubes, and blend a couple of seconds to mix well.
Start adding ice cubes, a few at a time and continuing to blend. Add ice until you reach your desired thickness.
This drink should be thick, but drinkable.