Generate a Google+ favicon for your blog and admin logo including Apple touch icon. Add G+ photo to your blog template and admin panel automatically.
Google Plus Favicon plugin automatically grabs your Google+ profile image for your blog, admin logo including Apple touch icon.
Install and activate. Open its settings and add your Google Plus account ID. Save your settings, that’s all.
Remember: Google+ ID means the number in the profile address. In the following Google+ profile address 107466614529996508363 is profile ID.
https://plus.google.com/107466614529996508363/posts
You can disable the web site icon option in General Settings which turns the favicon off.