Chocolate frosting is the secret to turning any cake into something truly special. Rich and creamy, this version shines with a blend of cream cheese and sour cream, delivering velvety texture and depth.
Mix: Add cocoa, powdered sugar, and salt. Mix to incorporate completely. Then, mix in the sour cream until no ribbons of cream remain.
¼ cup Dutch-process cocoa powder, 2 ½ - 3 cups sifted powdered sugar (2 ½ cups for less sweet and 3 cups for sweeter), 1 cup sour cream, ½ teaspoon kosher salt
Add the chocolate: With the mixer running on low speed, add the slightly cooled melted chocolate and mix until completely incorporated. As this frosting chills, it will become stiffen from the chocolate and butter, so I find it best to use it right away while soft or let it come to room temperature for best results.