May 22, 2013 No Comments FREE Key Lime Doughnut at Krispy Kreme Today Check-in with a friend on Foursquare at participating Krispy Kreme locations on May 22nd and both of you get a FREE Key Lime Doughnut at Krispy Kreme. Available while supplies last. FREE Key Lime Doughnut at Krispy Kreme – EXPIRED Facebook Twitter Add Comment Notify me of follow-up comments by email. Notify me of new posts by email.