There are no features in blogger dashboard to do this but there is a tricky way to make it done.
1. Sign in and go to your blogger dashboard.
2. Go to Settings > Basic
3. Click
+Add authors, type any new preferred email and click
Invite Authors.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhb4204N9vrUwwPAi-2ZOz_dlPom30UZ_eWmTnL3FR8nnkc__FODgGeKPJdWW983aZTz3CzZQRwX82T99EhICDib1x5mKv1Xa6_Q1RLphG6fDhBNlcvYqdpNaijWJQSlYctccmYdnfxt0RP/s320/addemail.PNG)
4. The new email will received the invitation and accept it.
5. Make the new authors as admin. You can now remove the old authors by clicking the
X button