There are two secrets to making perfectly smooth cream cheese frosting with enough body to swirl onto a cake or pipe through a pastry bag: Do not overbeat, and use cold—not softened—cream cheese. Feel free to vary the amount of powdered sugar to suit your taste.
The fastest method of all.
Combine in a food processor and pulse just until smooth and creamy:
If the frosting is too stiff, pulse for a few seconds longer; do not overprocess. If desired, stir in additional flavoring to taste, such as:
Beat in a medium bowl, or in a stand mixer with the paddle attachment, at low speed just until blended:
Add one-third at a time and beat just until smooth and the desired consistency:
If the frosting is too stiff, beat for a few seconds longer; do not overbeat. If desired, stir in additional flavoring to taste (see version I).