
A tender, buttery two-layer yellow cake made with sour cream and vanilla bean paste, topped with an ultra-rich double chocolate frosting featuring melted bittersweet and semisweet chocolate, cocoa powder, and a touch of espresso.
All dairy ingredients must be at room temperature for proper emulsification. The espresso powder amplifies the chocolate flavor without adding a coffee taste. If the frosting is too soft after processing, refrigerate in 5–10 minute intervals, stirring occasionally, until spreadable. Cake layers can be baked a day ahead, wrapped tightly in plastic wrap, and stored at room temperature.