Apparently you just mix it 60/40 fat/tapioca and hit it with a food processor.
http://www.gourmet.com/food/video/2008/05/goldfarb_tapiocamaltodextrin
http://answers.yahoo.com/question/index?qid=20061126190111AAIvI9e
Powdered Orange Blossom Yogurt
yogurt + orange blossom water + tapioca starch
Thorougly mix yogurt and orange blossom water. Stir in tapioca starch. Mix until thoroughly incorporated and a powder consistency is reached.
Technique: Tapioca Powdering
Adding a tapioca starch to a liquid causes the absorption of the liquid, turning the liquid into a powder. WD-50 uses this concept to make a powdered olive oil, and Alinea uses a similar method for their powdered salt caramel dessert. Specialized starches- tapioca maltodextrins- are used in such places. You can also use tapioca starch from the grocery store, although the tapioca flavor can be chalky and overpowering. Once the powder goes into your mouth, the original liquid feeling is achieved. Olive oil powder turns into olive oil, yogurt powder turns into yogurt.
Composition: Yogurt, Orange Blossom
To overcome the chalkiness of the tapioca starch, a vanilla yogurt is used. Upon reconstitution of the powder, the sourness and sweetness of the yogurt is what helps us to identify it as yogurt. The orange blossom water adds a strong fragrance that will also withstand the “stress” of being converted to a powder and back.
Ingredient: Orange Blossom Water
Neroli oil, the essential oil of the orange blossom, has a fragrance reminiscent of Morocco or Spain. At Goood Frikin Chicken, they pour orange blossom water over their rice pudding dessert (topped with cinnamon and pistachios).