JSFiddle - React, Tailwind, and code Playground

HTML

<button>
    <span><img src="http://www.famfamfam.com/lab/icons/silk/icons/disk.png" /></span>
    <span>Button Text</div>
</button>

<button style="width:90px">
    <span><img src="http://www.famfamfam.com/lab/icons/silk/icons/disk.png" /></span>
    <span>Button Text</div>
</button>

<button style="width:120px">
    <span><img src="http://www.famfamfam.com/lab/icons/silk/icons/disk.png" /></span>
    <span>Button Text</span>
</button>
        
<button style="width:120px">
    <span><img src="http://www.famfamfam.com/lab/icons/silk/icons/disk.png" style="width:48px" /></span>
    <span>Explicitly Sized Image</span>
</button>

CSS

BODY { padding: 16px; }

BUTTON SPAN {
    line-height: 14px;
    font-size: 14px;
    padding: 4px;
    display: inline-block;
    vertical-align: middle;
    text-align: center;    
}