Thermoplastic polyolefin compositions and a process for preparing the same are provided comprising a blend of polypropylene, and styrenic elastomer. The compositions may further comprise ethylene copolymer elastomer, polymer additive, such as polymer surface modifier, powder flow additive, stabilizer and/or color pigment. The compositions are particularly applicable for use in a slush molding process where low melt viscosity is desired to form improved surface quality thermoplastic polyolefin skin. A process is disclosed for preparing thermoplastic polyolefin into a slush moldable powder by melt compounding the composition to form pellets, and further processing the pellets by cryogenic pulverization or by extruding micropellets in one step using a gear pump to increase the melt pressure.