Place the chopped dark chocolate in a microwave-safe bowl. Microwave in 30-second intervals, stirring between each interval, until the chocolate is completely melted and smooth. Set aside to cool.
In the bowl of a stand mixer fitted with the paddle attachment, beat the softened cream cheese and butter together until well combined and creamy– about 1 minute.
Pour the melted dark chocolate into the cream cheese and butter mixture and beat until the chocolate is fully incorporated.
With the mixer on low speed, slowly add the powdered sugar and cocoa powder. Continue mixing on low speed until the dry ingredients are incorporated.
Stir in the vanilla and salt and then increase the speed to medium-high and whip the frosting until light and fluffy– about 2 minutes.
Use immediately and enjoy!