Code: Select all
<div class="ui-g ui-fluid" >
<div class="ui-g-12">
<button pButton>
<div>Content</div>
<i class="fa fa-home"></i>
</button>
</div>
</div>

I already submitted an issue of having the rendered when the label is missing.
https://github.com/primefaces/primeng/issues/9482