2 cups powdered sugar
1/4 cup unsalted butter, softened
2 to 3 tablespoons milk or heavy cream
1 teaspoon vanilla extract
Pinch of salt
Beat the butter until smooth
Add the powdered sugar gradually
Add the milk or cream one tablespoon at a time
Mix in the vanilla extract
Add the salt
Beat until light and fluffy
Add more milk for thinner icing
Add more powdered sugar for thicker icing