The way I do it- Mix the powder with a very small amount of water (hot or cold) till you can form it into a round shape- about 2-3tsp or so. Form into muffin shape and mocrowave for... 10 seconds, 15, 20, whatever works for you.
I used to do this often but then I discovered just putting a bit more water in the powder and just eating it- like an angel delight or butter icing consistancy!