How To Make Comments "Do Follow" in Blogger

Step 1: Login to Blogger->Dashboard--> Template Design

Step 2: Click on "Expand Widget Templates"

Step 3: Find the below mentioned code:

<a expr:href='data:comment.authorUrl' rel='nofollow'> 

Step 4: Replace the above code with following:  

<a expr:href='data:comment.authorUrl'> 

Step 5: Save the template and Done.