Simple Frosting

Directions

1. 1
   Beat until light and fluffy: 12 tablespoons (1 1/2 sticks) unsalted butter, softened.
2. 2
   Beat in: 1 1/3 cups powdered sugar, sifted.
3. 3
   Continue beating until light and fluffy.
4. 4
   Add: 1 teaspoon vanilla extract, 1/2 teaspoon fresh lemon juice.
5. 5
   Beat until smooth.
6. 6
   Flavor the frosting with 2 ounces melted, but not warm, bittersweet chocolate, or with 1/2 teaspoon lemon, orange, or tangerine zest.