Inulin powders in which at least a majority of the inulin is in the form of spherically shaped particles having diameters less than about two microns. Inulin powders that have greater solubility than corresponding non-powdered inulin. Powdered sweeteners containing inulin and sucralose in which the sucralose has improved thermal stability and the inulin has reduced hygroscopicity comprising particles substantially spherically shaped having diameters that are less than about two microns, usually less than one micron. The compositions can be prepared by forming a solution of the inulin, or sucralose and inulin, in water which is then spray-dried with an atomizing nozzle projecting a fine spray into an air stream at elevated temperatures in a chamber under a partial vacuum. Other ingredients, such as other high intensity sweeteners, natural sweeteners, non-fat dry milk, lactose, sugar alcohols, and flavorings also may be included.