Before conducting larger scale studies utilizing highly concentrated zein blends on an extruder, it is advisable to carry out experiments on a torque rheometer. Water and tri(ethylene glycol) (TEG) are known plasticizers for zein, however, the effects these materials have on zein rheology has not been studied using a torque rheometer. The amount of each plasticizer in zein was varied between 5 and 30%. It was demonstrated that water and TEG interact differently with zein. When the amount of water was above 10% at 90 o C, torque increased rapidly. With TEG, torque increased linearly with time and only at 120 o C did the rapid torque increase occur. Multiple torque increases for zein mixtures were observed, suggesting that processes that increase viscosity are an on-going process. Significant cross-linking is not the main source for the increased torque. The energy of activation of flow was determined when using 20% TEG. A model was developed relating %water, %TEG, temperature and rpm with initial torque.