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: black;
  height: 400px;
  width: 400px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.child {
  background: white;
  padding: 20px;
  width: 200px;
  height: 100px;
}