You might like to read following post :

Following is a simple steps which you required to follow in sequence for setting up custom domain.

Step 1: login into your blogger account with email id that is associated with your blog.

Step 2: Go to Setting > Basic button , Find Blog Address field Click On Add Custom Domain > Switch to advanced settings Settings Instructions Link.

Step 3: You will find two radio button in which you need to select second one  {On a subdomain (foo.example.com) }.  After that copy paste two Cname record in notepad. it is somewhat look like below image. ( Besure that first cname record has blog name that means we are creating subdomain   for blog.xyz.com you can use your own name here.)

  You might like to read following post : How To Setup Blogger Custom Domain With BigRock? (Remove “.Blogspot.Com” From URL) Following is a ...