This has probably already made the rounds, but a buddy just introduced me to this, the whole family flipped for it, so I thought I'd share. I'm going by memory, so fiddle around with the quantities until it suits:

6-8 dates (mejdool)
1 avocado
3-4 TBS cacao powder (I get a bag of unadulterated stuff at Whole Foods, don't remember the brand)
1 tsp vanilla
3-4 TBS water
I also add some flaked coconut

Put it in the food processor and pulse away. I had to wipe down the sides with the spatula a lot to get it to mix up consistently...but it's worth it...