found a high positive correlation between the number of AE events and their sensory evaluation. Salvador et al. (2009) also reported that the sensorially designated crispness of crisps was positively correlated with the number of AE events. On the other hand, Marzec (2012) found a negative correlation between the sensory crispness,the number of AE events and the force of biscuits with fat content ranging from 19.2 to 44.8%. Fat is a component that gives the biscuits delicacy and crispness. However, it should be emphasized that in this study the content of fat in the biscuits was at the level of 74.1, 64.8 or 55.6, and such a high proportion of fat caused small changes in crispness and hardness of the biscuits.