Ingredients

3 1/2 cups confectioners' sugar 

1 cup unsweetened cocoa powder 

12 tablespoons (1 1/2 sticks) unsalted butter, softened 

1/2 cup milk, room temperature 

2 teaspoons pure vanilla extract 

Preparation

Sift sugar and cocoa together in a medium bowl. Whisk in butter, milk, and vanilla until smooth. Use immediately.