Go to Packages > Settings View > Install Packages/Themes
Click the Themes button
Search for Cake
Click Install
Go to File > Extension Manager
Select the Themes tab
Search for Cake
Click Install
Save the Cake.tmTheme file
Go to Preferences > Browse Packages
Move Cake.tmTheme into the Packages folder
Go to View > Command Pallete
Type ext install then hit Enter
Type Cake
Click