White Castle coupon code: Buy One Get One FREE Impossible Slider
This October, White Castle has a special offer for all their customers: For a limited time, visit their restaurant nearest to your location to purchase one Impossible Slider and receive the second one entirely free! All you have to do is submit this coupon at the time of order. Limit to one coupon per customer. Valid at participant White Castles through October 31st, 2020.