Blend all ingredients except ice on high in a blender then add
crushed ice. Blend until thick and smooth. If you put this in a
frozen mug it will continue to thicken and you may be forced to
eat it with a spoon; one of those hard jobs, but someone has to
do it.
* The whey protein isolate is available at
Walmart in different flavors, although I buy mine at a health food
store because I prefer the unsweetened, unflavored variety.