A method for improving the properties of particles of a starch hydrolyzate product made by the partial hydrolysis of cereal and root based starches. Particles of starting material are blended with a volatile liquid other than water, and the resulting blend is compacted in a roller compactor without extraneous lubricant, to form a sheet. The sheet is broken into small particles which are sieved and dried. The resulting particles are non-spherical, appear crystalline under a light microscope and have a surface topography comprising cracks, crevices and fissures. These particles have good solubility, a bulk density comparable to the starting material, and no flow or dusting problems.