01 -
Whisk heavy cream, instant espresso powder, and unsweetened cocoa powder in a small bowl until smooth and fully dissolved.
02 -
In the bowl of a stand mixer fitted with the paddle attachment, beat mascarpone, cream cheese, and confectioners' sugar on medium-high speed until smooth, approximately 2 minutes. Scrape down the sides of the bowl.
03 -
Add the espresso-cocoa cream mixture, vanilla extract, and salt to the cheese mixture. Beat on low speed until just combined, then increase to medium-high speed and whip until light and fluffy, about 1 additional minute.
04 -
Transfer to a serving dish and dust the surface with additional cocoa powder. Serve immediately alongside ladyfingers for dipping.