What method or algorithm can crush things like that? If you look at the picture it is necessary that squeezed through his fingers around the filling and sweet cream. The structure at the candy sticky and quite viscous. If possible, you need to deform the geometry because the geometry is already on the uv position.

Thank you in advance!

I think FEM (Finite Element Method) works for you on that thing but maybe I'd do this in Maya with blendshapes or deformers which looks simpler.