Best Fast Food Secret Menu Items

From Shake Shack's peanut butter bacon burger to Subway's pizza sub, these six restaurants serve the best fast food items on their secret menus. Business Insider tells you all you need to know about business, finance, tech, science, retail, and more. Subscribe to our channel and visit us at: http://www.businessinsider.com/ BI on Facebook: https://www.facebook.com/businessinsider/ BI on Instagram: https://www.instagram.com/businessinsider/ BI on Twitter: https://twitter.com/businessinsider See more from our talent: Joe Avella: https://www.facebook.com/avellajoe/