yea sattu is quite refreshing drink
i dont know how its made,but its made in villages n i get it by my grandfather 
here are some pics of sattu in which you add SHAKKAR not the KHAND (SUGAR) n nor the GURR
SATTU (not black
even in solution its not black)
n SHAKKAR,in case if u dont know 
P.S
sorry for little offtopic post,resized the huge images