JSFiddle - React, Tailwind, and code Playground

HTML

<div class="main">
    <div class="inner"> This paragraph should be centered in the larger box</div>
</div>

CSS

.main {
    height: 72px;
    vertical-align: middle;
    display:table-cell;
    border: 1px solid #000000;
}

.inner {

   vertical-align: middle;
 border: 1px solid #000000;    
}