The CookieCore mod is a simple library, it is also a dependent mod that is required for mods to work from the author of ephys and not only, this mod is only needed for several mods to work, this mod itself does not add or change anything.
Required for the mods to work:
How to install CookieCore mod ?:
Install forge for minecraft.
Download the mod and place the file at: C: \ Users \ your user pc \ AppData \ Roaming \ .minecraft \ mods
Open the minecraft launcher and select the version of minecraft with forge in the profile.