Help !! How to make a cake(softbody) break as it falls on the floor. ? (Project file attached)

I am trying to apply some softbody fracture using houdini to my cake model. My problem is, when i meddle with the values like fracture thresshold, volume stiffness, i am not able to get the exact cake or bread breaking process. instead the mesh scrables if i decrease the fracture threshold… Help. Please..

Maybe approaching it from a vellum standpoint would be harder than using grains. Grains might work better as you could clump the particles together and create a cakie mess.