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The objective of this study was to measure flowability properties of distillers dried grains with solubles (DDGS). A direct shear cell test using an Instron load frame was developed to measure cohesion and internal angle of friction. The effect of drying method (air or superheated steam), drying temperature (110C, 130C, and 160C), soluble content (0% and 50%), and moisture content (5% and 15% wb) on cohesion and angle of internal friction were examined. Samples were preconsolidated before testing and sheared under four normal loads. Maximum shear stress for each test was recorded. Cohesion and angle of internal friction were then determined by plotting maximum shear stress versus normal stress. For air dried samples, cohesion ranged from 0.151 to 0.268 kPa and angles of internal friction ranged from 15.1 to 26.9. For superheated steam dried samples, cohesion ranged from 0.151 to 0.324 kPa and angles of internal friction ranged from 14.4 to 28.9.