On tap at Flying Saucer in St. Louis, “festive” robust porter fused with Caffe Calabria coffee and sugared vanilla gains upfront peppermint adjunct to amplify its fudgy black chocolate malting. Like a Peppermint Pattie, its evergreen-fresh peppermint bark confection drapes the dry cocoa bean insistence and chewy mocha-enriched cookie dough spine.