So, you want to use a shortcode, and you want to put it in a widget. You probably found out that the shortcode doesn’t process, but instead displays the shortcode text on the page. Lame, right?
Luckily there’s a really easy quick fix for this.
Simply add this code to your theme’s functions.php file
// Enable shortcodes in text widgets
That’s it! Now your shortcode actually gets processed and displays what you intended to display.