<div class="parent">
  <div class="child">🙂</div>
</div>
.parent {
  /* Stuff that matters */
  display: table;
  text-align: center;
  /* Style only */
  width: 200px;
  height: 200px;
  border: solid 1px;
  margin: 50px;
}

.child {
  /* Stuff that matters */
  display: table-cell;
  vertical-align: middle;
  /* Style only */
  font-size: 36px;
}
View Compiled

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.