Solly I make shakes all the time. I use frozen fruit, skim milk, plain fat free yogurt, a spoon of Splenda and I also use protien in mine. I use PVL whey gourmet. One scoop counts as 3 points. It's the only protein powder that I can find that has no added sugar - it's sweetend with Splenda. If you are following the Core plan than you only have to count the scoop of whey gourment that you use. It come is many diffrent flavors and no matter which on you pick they are all 3 points per scoop in value.
Hope that helps you