Sucanat is non-refined cane sugar. Unlike refined and processed white sugar, Sucanat retains its molasses content; it is essentially pure dried sugar cane juice. The juice is extracted by mechanical processes, heated and cooled at which point the small brown grainy crystals are formed.
Sucanat is generally accepted as a substitute for brown sugar. Unlike regular brown sugar, sucanat is grainy instead of crystalline. Of all major sugars derived from sugar cane, Sucanat ranks the highest in nutritional value, containing a smaller proportion of sucrose than white cane sugar.
Taken from http://en.wikipedia.org/wiki/Sucanat
Sucanat is what I use in place of brown sugar and can be purchased at many health food stores and can also be found online.