• Place the vegan butter into the bowl of your stand mixer and beat it for 2 to 3 minutes, until it becomes exceptionally smooth, pale, and creamy.
• Gradually add the powdered sugar and cocoa powder, mixing slowly at first and then increasing the speed as the ingredients become incorporated. Continue beating until the mixture is velvety and evenly blended.
• Stir in the vanilla extract, then begin adding the non-dairy milk a little at a time. Mix well after each addition, using only enough milk to create a frosting that is soft, fluffy, and easy to spread.
• If the frosting becomes too loose, add a little more powdered sugar to bring it back to a thicker consistency. If it feels too stiff, add a few drops of non-dairy milk at a time until it reaches the texture you prefer.
• For a deeper chocolate flavor, add the instant espresso powder, if using, and beat briefly until fully combined.
• Once finished, keep the frosting at room temperature while decorating. It can be spread generously over cakes or piped beautifully onto cupcakes.

Chef's Notes

• The exact amount of non-dairy milk needed can vary depending on the vegan butter you use. Some brands contain more moisture, while firmer stick-style butters may require a little extra liquid. For the best results, always add the milk gradually and adjust as needed.
• Soy milk works wonderfully in this recipe, but almond, oat, coconut, or any other plant-based milk can be used successfully.
• This recipe yields enough frosting to generously cover a three-layer 8-inch cake or a two-layer 9-inch cake. It also provides plenty for decorating approximately 12 to 24 cupcakes, depending on how much frosting you pipe onto each one.
• Any leftover frosting can be stored in an airtight container in the refrigerator for up to one week. It also freezes very well, making it convenient to prepare ahead or save for future baking projects.