<table>
  <tr>
    <td>
      This is a centered multiple lines element in a real table layout cell.
    </td>
  </tr>
</table>

<div class="center-table">
  <p>This is a vertically centered multiple lines element in a table layout.</p>
</div>

body {
  background: #40BDB7;
  font-size: 80%;
}

table {
  background: white;
  width: 240px;
  border-collapse: separate;
  margin: 20px;
  height: 250px;
  border-radius: 5px;
}

table td {
  background: black;
  color: white;
  padding: 20px;
  border: 10px solid white;
  /* default is vertical-align: middle; */
}

.center-table {
  display: table;
  height: 250px;
  background: white;
  width: 240px;
  margin: 20px;
}
.center-table p {
  display: table-cell;
  margin: 0;
  background: black;
  color: white;
  padding: 20px;
  border: 10px solid white;
  vertical-align: middle;
}