Google has added two new gadgets that you can add to your Blogger powered blog.
The first gadget is to add a Google +1 button to your blog posts. This feature is already available through the sharing functionality from settings. With gadget, you get more flexibility.
The second gadget is to add a Google Plus Badge to your blog. This can link to your personal profile page or to a Google+ Brand Page.
To add these gadgets to your blog, select “Add a Gadget” from the “Layout” tab of Blogger, and select them from the list of gadgets under “Basics”. You’ll need to copy your Google+ ID (personal or Page) to configure the brand badge gadget for your blog.