A set of crumb from 17 bread products (including two dupli- cates) made with composite flour containing wheat flour and different quantities and types of cassava flour as well as psyllium fibers was tested. Huge variations in crumb properties were found when products were analyzed by DA, TPA and physical measure- ments. Results from DA showed that the type of cassava flour is decisive for the quantity of cassava flour that can be incorporated into a bread recipe without influencing the sensory properties. Up to 30% of wheat flour could be substituted with FdM only affecting the volume and specific volume while a 30% substitution of wheat flour with any of the other tested types of cassava flour caused changes in results from both DA and instrumental measurements. Addition of fibers led to a harder and more integrated crumb structure. The latter result was only revealed by the TPA. While