JSFiddle - React, Tailwind, and code Playground

HTML

<div class="parent">
  <div class="child">I'm vertically centered multiple lines of text in a container. Centered with a ghost pseudo element</div>
</div>

CSS

.parent {
  background: red;
  height: 400px;
  margin: 20px;
  width: 400px;
  position: relative;
}
.child {
  position: absolute;
  top: 50%;
  left: 50%;
  background: black;
  color: white;
  width: 200px;
  height: 200px;
  margin: -120px 0 0 -120px;
  padding: 20px;
}