This is soy powder in a very pure form -- no emulsifiers, no added flavors no anything else, so for instance, the color is a bit brown-ish, it doesn't dissolve well in cool water, and it tastes like soy, not like milk! So heat a little bit of water in the microwave and dissolve it in that before adding cold water, and add spices -- cinnamon, fennel, vanilla, cloves and even ginger are great choices for this =)
I use this in recipes that have milk, where it provides the protein and the oils, for my breakfast oats, and in hot chocolate, where as a bonus it creates a delicious foam on top of it.