Ingredients

1 cup (2 sticks) unsalted butter, room temperature 

6 to 8 cups confectioners' sugar 

1/2 cup milk 

1 teaspoon pure vanilla extract 

Preparation

In the bowl of an electric mixer fitted with the paddle attachment, beat butter until smooth and creamy, 2 to 3 minutes. With mixer on low speed, add 6 cups sugar, milk, and vanilla; mix until light and fluffy. If necessary, gradually add remaining 2 cups sugar to reach desired consistency.