Icons on buttons? You bet.
Note: You will run into issues if you are using the 'force centering of all images' in your stylesheet. This is one of a few reasons why it's not advisable to use the force center (or at least why I need to recode it!) - The other was the issues it created with the book cover widget (see footer at https://danielloganauthor.com/). Of course, it may be exactly the effect you were looking for too!