April 26, 2021 No Comments FREE Dessert on a Stick at White Castle Show your proof of your COVID-19 vaccination for a FREE Dessert On-A-Stick at your local White Castle!! VALID thru 05/31/2021. Valid at participating Castles. FREE Dessert on a Stick at White Castle – EXPIRED Facebook Twitter Add Comment Notify me of follow-up comments by email. Notify me of new posts by email.