JSFiddle - React, Tailwind, and code Playground

HTML

<div class="button solution0">Button Label</div>
<hr />
<div class="button solution1">Button Label</div>
<hr />
<div class="button solution2">Button Label</div>

CSS

.button{
    display: block;
    background-color: darkred;
    color: white;
    width: 120px;
    height: 120px;
    text-align: center;
}
.solution0 {
    line-height: 220px;
    vertical-align: bottom;
}
.solution1:before {
    content: '';
    display: block;
    height: 100px;
}
.solution2 {
    display: -webkit-box;
    -webkit-box-align: end;
    -webkit-box-pack: center;
    display: -moz-box;
    -moz-box-align: end;
    -moz-box-pack: center;
    display: box;
    box-align: end;
    box-pack: center;
}