- 4 tablespoons unsalted butter, room temperature
- 2 cups confectioners' sugar
- 2 tablespoons milk
- 1/2 teaspoon vanilla extract
- 1 pinch salt
Use immediately, or cover with plastic wrap and refrigerate up to 3 days. Before using, bring to room temperature.
In a small bowl, beat together butter, sugar, milk, vanilla, and salt until light and fluffy.