Fluffy Buttercream Frosting

Ingredients
1 cup butter (2 sticks), softened
3 - 4 cups confectioner’s sugar, sifted
2 teaspoons vanilla
pinch salt
2-3 tablespoons milk, heavy cream, or half-and-half

Instructions
Place softened butter into the bowl of a stand mixer that has been fitted with the paddle attachment. Turn the mixer on a medium setting and cream the butter until it is smooth and has lightened in color, about 3 minutes.

Add confectioner's sugar, ½ a cup at a time. After each cup has been incorporated, turn the mixer onto the highest speed setting and for about 10 seconds to lighten the frosting.

Add vanilla and a pinch of salt and combine until well-incorporated.

Add milk, heavy cream or half-and-half until the frosting has reached the preferred consistency. For a firmer frosting, add more confectioner's sugar, a ¼ cup at a time. For a softer frosting, add more milk or cream, a tablespoon at a time.

(Source: http://addapinch.com/classic-vanilla-buttercream-frosting-recipe/#axzz2wYqdpHg6)