Button Names on top of their icon?

[Brahmanathaswami]

Is there some way to get a button name to be centered on top of it's icon?


This is a context where the icon is designed to be a background for the 
button and the center area is clear, plain, flat colored and meant to 
take the button label. Of course can import the image and put a 
transparent button on top, but ideally we could center the button name 
on top of the icon itself... but I can't find a way to do that... is 
there a way?

BR