yefqq 
Ingredients:
- 3 cups powdered sugar
- 1/3 cup butter, softened
- 1 1/2 teaspoons vanilla
- 1 to 2 tablespoons milk
Steps:
In medium bowl, mix powdered sugar and butter with spoon or electric mixer on low speed. Stir in vanilla and 1 tablespoon of the milk.
Gradually beat in just enough remaining milk to make frosting smooth and spreadable. If frosting is too thick, beat in more milk, a few drops at a time. If frosting becomes too thin, beat in a small amount of powdered sugar. Frosts 13×9-inch cake generously, or fills and frosts an 8- or 9-inch two-layer cake.