So I've had a little time to come up with some fun stuff for our farm market business. My latest endeavor is to develop a bunch of bubble tea drinks using local fruit as a base. A couple of problems arise. In my searching of sites that offer bubble tea supplies, all the offerings have artificial flavors, colors and other icky ingredients. Not so bad though, since I can forgo all that and use the fruit I froze from last summer. However, I can't figure out what makes the tapioca pearls black. I bought tapioca pearls in various sizes from my asian supermarket and once cooked, they are clear or translucent. The bubble tea joints sell pearls that are black after cooking and really show up in the drink, but I don't want to use them if there's a bunch of artificial crap in them just to turn them black. Packaging is of no help as the ingredients just say "tapioca pearls." What do any of you know about the black pearls? BDL?