
Gather all of your ingredients.
In a mixing bowl, beat the butter with a hand mixer on high for 2–3 minutes until light and fluffy.
Add all of the powdered sugar, cocoa powder, vanilla, and half of the milk. Begin mixing on low speed to prevent a mess, then gradually increase to medium until well combined. Add the remaining milk a little at a time until the frosting reaches your desired consistency.**
Use the frosting to top cakes, cupcakes, or brownies. Enjoy!