How to take baby picture with blur surrounding in same layer?

[barochia]

Dear friends, Need your help. I have 70 D and 18-135 mm IS STM lens. Can you please let me know how can I take baby picture with blur surrounding when baby sleeping on bed ( same layer ) ? Which settings I should use. I tried to find in manual but I couldn't find it. 

Thanks for for your help.

[ebiggs1]

"...that can also be added in post processing using software."

It is a great idea to use a post editor for the effect you want but next time take the baby out of the freezer first.