I've tried the chocolate & the Pina Colada, but I must not be making them right because there not sweet and I just don't like the taste. I did mix both with Vanilla Yogurt so maybe I just don't like Vanilla Yogurt

What is the simplest but yet best way to make the shakes? Do you just mix 1 scoop of whatever flavor with water or ice? Is it better to use a blender?