Lemon Frosting

Makes 4 1/2 cups| Hands-On Time: 05m| Total Time: 10m

Ingredients

• 2 cups (4 sticks) unsalted butter, at room temperature
• 2 tablespoons finely grated lemon zest
• 1 pound confectioners’ sugar (about 3 3/4 cups), sifted
• pinch kosher salt

Directions

1. Using an electric mixer, beat the butter and lemon zest on high until light and fluffy, 3 to 5 minutes. Reduce mixer speed to low. Gradually add the sugar, then the salt, and beat until smooth, scraping down the sides of the bowl as necessary. 

Source :  http://www.realsimple.com/food-recipes/browse-all-recipes/lemon-frosting-00000000057757/index.html