This research aims at explaining the macroscopic (physical) properties of fat-based model suspensions through insights in the fat crystallization at different length scales (nano-, meso- and micro-scale). Therefore, this research uses a very advanced toolbox comprising ultra-small angle X-ray scattering (USAXS), synchrotron microbeam X-ray diffraction, Fourier transform infrared (FTIR) and Raman spectroscopy, and atomic force microscopy (AFM) besides the conventional techniques.