During initial stages of frying, rapid moisture loss was observed due to surface moisture evaporation. As frying time increased, the rate of moisture loss decreased and stabilized beyond 20 s period. The change in pressure of the super heated water vapour inside the papad might have caused cell separa- tion, which resulted in blistering on the surface of the papads. The diffusion coefficient was maximum for the papads fried at 185 ± 1 °C (5.03 · 10