Australian Crunchie is brittle

 

This delicacy tastes like a British Crunchie bar. When teaching, I tend to use Rich Tea biscuits to illustrate brittle failure and Mars Bars to show ductile failure. In brittle fracture, there is no deforming of the material as it breaks so the bits can be put together again to show the whole. I found this nice explanation which is my first introduction to the ScienceDirect website. It looks useful.