must try; marbled sheet cake; buttery and sweet, with a tight crumb, but not at all dense, marbled throughout with vanilla and cocoa; both in the cake and on top with the glaze-y icing. That icing, by the way, firms up so glossy and gorgeous, the kind that has a thin, shattering crust right on top, so perfect and almost donut-like;  big hit of buttermilk in both the cake and the cocoa vanilla swirled butter icing