Into the bowl of a stand mixer, add Unsalted Butter (1 cup) and Powdered Confectioners Sugar (3 cup). Mix until well-combined.
Add Vanilla Extract (2 teaspoon) and continue to mix.
When mixture is creamy, add Whole Milk (1 tablespoon). Continue mixing.
Use to top cakes, cinnamon rolls, or other desserts. Enjoy!