Just wanted to share my quick and simple method for making frosted glass.
I saw a lot of complex methods for setting it up which yields better results, but this is a fast set up for it.
Here is the Material Editor:
There are a couple of settings you need to change with the material. Firstly set it to translucent (obviously). Then, below that, go to translucency, and change the lighting mode to Surface TranslucencyVolume. Lastly, click on Noise and adjust the noise scale settings to adjust the scale of the noise (its just like the UV scale of the noise map).
The basic principle of this shader is that the refraction “scatters” the light like it would in real life cases.