Since I had an issue with evaporated cane juice not dissolving in my first attempt to make homemade chocolate chips, I took the advice of my friend Jami. She advised powdering it in a countertop appliance.
The Vita-Mix far and away produced the best powdered sweetener. After less than 30 seconds on HIGH in the dry container (while using the tamper throughout), the Vitamix produced powdered Rapadura. (I put 2 cups of Rapadura in the VM to ensure good circulation.)
On the other hand, the food processor achieved only partial powdering after about three minutes. Again, I put two cups in it to ensure good circulation.