The new updated interface of Blogger do not let the users reach the HTML if they are using the Dynamic Views. Not even this if you want to have a look on the older look of Blogger than this will help you to get to it.
Just try using this address here. Basically this is the address to add widget via HTML or Add Page Element. But this thing makes itself useful in reaching the older interface. All you need is log in and paste or click the link.
Required field must not be blank so put any thing in it, a mere alphabet will do. Now Click Add Widget.
Subscribe via Email