Buy One Duncan Hines Frosting Creations Starter and Get a Free Duncan Hines Frosting Creations Flavor Packet April 10, 2014January 11, 2013 by Steph Post contains sponsored/affiliate links and I get commissions for purchases made from links. Smartsource Coupon Ex. 04-10-13 (Print limit is 2) Click here to print Buy One Duncan Hines Frosting Creations Starter and Get a Free Duncan Hines Frosting Creations Flavor Packet The bar code on the coupon starts with a 5.